[+] placed queen at (0,0) [>] CALL solve(1) [x] can't place queen at (1,0) [x] can't place queen at (1,1) [+] placed queen at (1,2) [>] CALL solve(2) [x] can't place queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,2) [+] placed queen at (1,3) [>] CALL solve(2) [x] can't place queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,3) [+] placed queen at (1,4) [>] CALL solve(2) [x] can't place queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 0 4 7 5 2 6 1 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,4) [+] placed queen at (1,5) [>] CALL solve(2) [x] can't place queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 0 5 7 2 6 3 1 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,5) [+] placed queen at (1,6) [>] CALL solve(2) [x] can't place queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 0 6 3 5 7 1 4 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 0 6 4 7 1 3 5 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,6) [+] placed queen at (1,7) [>] CALL solve(2) [x] can't place queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,5) [x] can't place queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,7) [-] removed queen at (0,0) [+] placed queen at (0,1) [>] CALL solve(1) [x] can't place queen at (1,0) [x] can't place queen at (1,1) [x] can't place queen at (1,2) [+] placed queen at (1,3) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 1 3 5 7 2 0 6 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,3) [+] placed queen at (1,4) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,0) [x] can't place queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 1 4 6 0 2 7 5 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 1 4 6 3 0 7 5 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,4) [+] placed queen at (1,5) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 1 5 0 6 3 7 2 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,0) [x] can't place queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 1 5 7 2 0 3 6 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,5) [+] placed queen at (1,6) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,0) [x] can't place queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 1 6 2 5 7 4 0 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,2) [x] can't place queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 1 6 4 7 0 3 5 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,6) [+] placed queen at (1,7) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,0) [x] can't place queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,2) [x] can't place queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 1 7 5 0 2 4 6 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,5) [x] can't place queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,7) [-] removed queen at (0,1) [+] placed queen at (0,2) [>] CALL solve(1) [+] placed queen at (1,0) [>] CALL solve(2) [x] can't place queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,3) [x] can't place queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 2 0 6 4 7 1 3 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,0) [x] can't place queen at (1,1) [x] can't place queen at (1,2) [x] can't place queen at (1,3) [+] placed queen at (1,4) [>] CALL solve(2) [x] can't place queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 2 4 1 7 0 6 3 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [+] placed queen at (7,0) [>] CALL solve(8) [*] SUCCESS solution = { 2 4 1 7 5 3 6 0} [-] removed queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 2 4 6 0 3 1 7 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 2 4 7 3 0 6 1 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,4) [+] placed queen at (1,5) [>] CALL solve(2) [x] can't place queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 2 5 1 4 7 0 6 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 2 5 1 6 0 3 7 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 2 5 1 6 4 0 7 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [+] placed queen at (7,1) [>] CALL solve(8) [*] SUCCESS solution = { 2 5 3 0 7 4 6 1} [-] removed queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [+] placed queen at (7,0) [>] CALL solve(8) [*] SUCCESS solution = { 2 5 3 1 7 4 6 0} [-] removed queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [+] placed queen at (7,1) [>] CALL solve(8) [*] SUCCESS solution = { 2 5 7 0 3 6 4 1} [-] removed queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 2 5 7 0 4 6 1 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 2 5 7 1 3 0 6 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,5) [+] placed queen at (1,6) [>] CALL solve(2) [x] can't place queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 2 6 1 7 4 0 3 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 2 6 1 7 5 3 0 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,6) [+] placed queen at (1,7) [>] CALL solve(2) [x] can't place queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 2 7 3 6 0 5 1 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,3) [x] can't place queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,5) [x] can't place queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,7) [-] removed queen at (0,2) [+] placed queen at (0,3) [>] CALL solve(1) [+] placed queen at (1,0) [>] CALL solve(2) [x] can't place queen at (2,0) [x] can't place queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,2) [x] can't place queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 3 0 4 7 1 6 2 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [+] placed queen at (7,1) [>] CALL solve(8) [*] SUCCESS solution = { 3 0 4 7 5 2 6 1} [-] removed queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,0) [+] placed queen at (1,1) [>] CALL solve(2) [x] can't place queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [+] placed queen at (7,6) [>] CALL solve(8) [*] SUCCESS solution = { 3 1 4 7 5 0 2 6} [-] removed queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 3 1 6 2 5 7 0 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [+] placed queen at (7,0) [>] CALL solve(8) [*] SUCCESS solution = { 3 1 6 2 5 7 4 0} [-] removed queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 3 1 6 4 0 7 5 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 3 1 7 4 6 0 2 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [+] placed queen at (7,6) [>] CALL solve(8) [*] SUCCESS solution = { 3 1 7 5 0 2 4 6} [-] removed queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,1) [x] can't place queen at (1,2) [x] can't place queen at (1,3) [x] can't place queen at (1,4) [+] placed queen at (1,5) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [+] placed queen at (7,6) [>] CALL solve(8) [*] SUCCESS solution = { 3 5 0 4 1 7 2 6} [-] removed queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,0) [x] can't place queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 3 5 7 1 6 0 2 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [+] placed queen at (7,1) [>] CALL solve(8) [*] SUCCESS solution = { 3 5 7 2 0 6 4 1} [-] removed queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,5) [+] placed queen at (1,6) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 3 6 0 7 4 1 5 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,0) [x] can't place queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 3 6 2 7 1 4 0 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,2) [x] can't place queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [+] placed queen at (7,7) [>] CALL solve(8) [*] SUCCESS solution = { 3 6 4 1 5 0 2 7} [-] removed queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [+] placed queen at (7,1) [>] CALL solve(8) [*] SUCCESS solution = { 3 6 4 2 0 5 7 1} [-] removed queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,6) [+] placed queen at (1,7) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 3 7 0 2 5 1 6 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 3 7 0 4 6 1 5 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,0) [x] can't place queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,2) [x] can't place queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 3 7 4 2 0 6 1 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,7) [-] removed queen at (0,3) [+] placed queen at (0,4) [>] CALL solve(1) [+] placed queen at (1,0) [>] CALL solve(2) [x] can't place queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 4 0 3 5 7 1 6 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,3) [x] can't place queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,5) [x] can't place queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 4 0 7 3 1 6 2 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 4 0 7 5 2 6 1 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,0) [+] placed queen at (1,1) [>] CALL solve(2) [x] can't place queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [+] placed queen at (7,6) [>] CALL solve(8) [*] SUCCESS solution = { 4 1 3 5 7 2 0 6} [-] removed queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [+] placed queen at (7,0) [>] CALL solve(8) [*] SUCCESS solution = { 4 1 3 6 2 7 5 0} [-] removed queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,3) [x] can't place queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 4 1 5 0 6 3 7 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,5) [x] can't place queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 4 1 7 0 3 6 2 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,1) [+] placed queen at (1,2) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [+] placed queen at (7,6) [>] CALL solve(8) [*] SUCCESS solution = { 4 2 0 5 7 1 3 6} [-] removed queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 4 2 0 6 1 7 5 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,5) [x] can't place queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [+] placed queen at (7,1) [>] CALL solve(8) [*] SUCCESS solution = { 4 2 7 3 6 0 5 1} [-] removed queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,2) [x] can't place queen at (1,3) [x] can't place queen at (1,4) [x] can't place queen at (1,5) [+] placed queen at (1,6) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [+] placed queen at (7,1) [>] CALL solve(8) [*] SUCCESS solution = { 4 6 0 2 7 5 3 1} [-] removed queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 4 6 0 3 1 7 5 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 4 6 1 3 7 0 2 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [+] placed queen at (7,7) [>] CALL solve(8) [*] SUCCESS solution = { 4 6 1 5 2 0 3 7} [-] removed queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 4 6 1 5 2 0 7 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [+] placed queen at (7,1) [>] CALL solve(8) [*] SUCCESS solution = { 4 6 3 0 2 7 5 1} [-] removed queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,6) [+] placed queen at (1,7) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [+] placed queen at (7,6) [>] CALL solve(8) [*] SUCCESS solution = { 4 7 3 0 2 5 1 6} [-] removed queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 4 7 3 0 6 1 5 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,3) [x] can't place queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,5) [x] can't place queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,7) [-] removed queen at (0,4) [+] placed queen at (0,5) [>] CALL solve(1) [+] placed queen at (1,0) [>] CALL solve(2) [x] can't place queen at (2,0) [x] can't place queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,2) [x] can't place queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 5 0 4 1 7 2 6 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,0) [+] placed queen at (1,1) [>] CALL solve(2) [x] can't place queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 5 1 6 0 2 4 7 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 5 1 6 0 3 7 4 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,1) [+] placed queen at (1,2) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 5 2 0 6 4 7 1 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 5 2 0 7 3 1 6 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [+] placed queen at (7,6) [>] CALL solve(8) [*] SUCCESS solution = { 5 2 0 7 4 1 3 6} [-] removed queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [+] placed queen at (7,7) [>] CALL solve(8) [*] SUCCESS solution = { 5 2 4 6 0 3 1 7} [-] removed queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [+] placed queen at (7,6) [>] CALL solve(8) [*] SUCCESS solution = { 5 2 4 7 0 3 1 6} [-] removed queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 5 2 6 1 3 7 0 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 5 2 6 1 7 4 0 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 5 2 6 3 0 7 1 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,2) [+] placed queen at (1,3) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 5 3 0 4 7 1 6 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [+] placed queen at (6,0) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 5 3 1 7 4 6 0 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [+] placed queen at (7,7) [>] CALL solve(8) [*] SUCCESS solution = { 5 3 6 0 2 4 1 7} [-] removed queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 5 3 6 0 7 1 4 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,3) [x] can't place queen at (1,4) [x] can't place queen at (1,5) [x] can't place queen at (1,6) [+] placed queen at (1,7) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [+] placed queen at (7,2) [>] CALL solve(8) [*] SUCCESS solution = { 5 7 1 3 0 6 4 2} [-] removed queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,2) [x] can't place queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,7) [-] removed queen at (0,5) [+] placed queen at (0,6) [>] CALL solve(1) [+] placed queen at (1,0) [>] CALL solve(2) [x] can't place queen at (2,0) [x] can't place queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 6 0 2 7 5 3 1 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,3) [x] can't place queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,5) [x] can't place queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,0) [+] placed queen at (1,1) [>] CALL solve(2) [x] can't place queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 6 1 3 0 7 4 2 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,3) [x] can't place queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 6 1 5 2 0 3 7 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,5) [x] can't place queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,1) [+] placed queen at (1,2) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 6 2 0 5 7 4 1 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,5) [x] can't place queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 6 2 7 1 4 0 5 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,2) [+] placed queen at (1,3) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [+] placed queen at (4,7) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 6 3 1 4 7 0 2 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 6 3 1 7 5 0 2 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [+] placed queen at (2,5) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,5) [x] can't place queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [+] placed queen at (3,4) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,3) [+] placed queen at (1,4) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [+] placed queen at (6,7) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [+] placed queen at (5,7) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 6 4 2 0 5 7 1 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [+] placed queen at (3,7) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [+] placed queen at (6,1) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,7) [-] removed queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [+] placed queen at (2,7) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [+] placed queen at (5,2) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [+] placed queen at (4,3) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,7) [-] removed queen at (1,4) [x] can't place queen at (1,5) [x] can't place queen at (1,6) [x] can't place queen at (1,7) [-] removed queen at (0,6) [+] placed queen at (0,7) [>] CALL solve(1) [+] placed queen at (1,0) [>] CALL solve(2) [x] can't place queen at (2,0) [x] can't place queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,0) [+] placed queen at (1,1) [>] CALL solve(2) [x] can't place queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 7 1 3 0 6 4 2 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [+] placed queen at (7,5) [>] CALL solve(8) [*] SUCCESS solution = { 7 1 4 2 0 6 3 5} [-] removed queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,1) [+] placed queen at (1,2) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [+] placed queen at (7,3) [>] CALL solve(8) [*] SUCCESS solution = { 7 2 0 5 1 4 6 3} [-] removed queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,0) [x] can't place queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [+] placed queen at (2,4) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [x] can't place queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,2) [+] placed queen at (1,3) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [+] placed queen at (6,6) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [+] placed queen at (7,4) [>] CALL solve(8) [*] SUCCESS solution = { 7 3 0 2 5 1 6 4} [-] removed queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,1) [x] can't place queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [+] placed queen at (6,4) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,3) [+] placed queen at (1,4) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [+] placed queen at (6,5) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [+] placed queen at (3,5) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,2) [x] can't place queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [+] placed queen at (2,6) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [+] placed queen at (4,2) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [+] placed queen at (5,5) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [+] placed queen at (5,1) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [+] placed queen at (3,3) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [+] placed queen at (4,5) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [x] can't place queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,4) [+] placed queen at (1,5) [>] CALL solve(2) [+] placed queen at (2,0) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [+] placed queen at (3,2) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [+] placed queen at (5,6) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [+] placed queen at (6,3) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,0) [+] placed queen at (2,1) [>] CALL solve(3) [x] can't place queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [+] placed queen at (5,0) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,1) [+] placed queen at (2,2) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [x] can't place queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [x] can't place queen at (4,0) [+] placed queen at (4,1) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [+] placed queen at (5,3) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [x] can't place queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [x] can't place queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,2) [+] placed queen at (2,3) [>] CALL solve(3) [+] placed queen at (3,0) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,0) [+] placed queen at (3,1) [>] CALL solve(4) [x] can't place queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [+] placed queen at (4,6) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [+] placed queen at (5,4) [>] CALL solve(6) [x] can't place queen at (6,0) [x] can't place queen at (6,1) [+] placed queen at (6,2) [>] CALL solve(7) [x] can't place queen at (7,0) [x] can't place queen at (7,1) [x] can't place queen at (7,2) [x] can't place queen at (7,3) [x] can't place queen at (7,4) [x] can't place queen at (7,5) [x] can't place queen at (7,6) [x] can't place queen at (7,7) [-] removed queen at (6,2) [x] can't place queen at (6,3) [x] can't place queen at (6,4) [x] can't place queen at (6,5) [x] can't place queen at (6,6) [x] can't place queen at (6,7) [-] removed queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,1) [x] can't place queen at (3,2) [x] can't place queen at (3,3) [x] can't place queen at (3,4) [x] can't place queen at (3,5) [+] placed queen at (3,6) [>] CALL solve(4) [+] placed queen at (4,0) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,0) [x] can't place queen at (4,1) [x] can't place queen at (4,2) [x] can't place queen at (4,3) [+] placed queen at (4,4) [>] CALL solve(5) [x] can't place queen at (5,0) [x] can't place queen at (5,1) [x] can't place queen at (5,2) [x] can't place queen at (5,3) [x] can't place queen at (5,4) [x] can't place queen at (5,5) [x] can't place queen at (5,6) [x] can't place queen at (5,7) [-] removed queen at (4,4) [x] can't place queen at (4,5) [x] can't place queen at (4,6) [x] can't place queen at (4,7) [-] removed queen at (3,6) [x] can't place queen at (3,7) [-] removed queen at (2,3) [x] can't place queen at (2,4) [x] can't place queen at (2,5) [x] can't place queen at (2,6) [x] can't place queen at (2,7) [-] removed queen at (1,5) [x] can't place queen at (1,6) [x] can't place queen at (1,7) [-] removed queen at (0,7)