The First Solutions
Chessboard size 33×33
1, 3, 5, 2, 4, 9, 11, 13, 15, 6, 8, 25, 27, 33, 31, 23, 28, 26, 29, 32, 30, 16, 18, 12, 10, 17, 7, 14, 21, 19, 24, 22, 20
1, 3, 5, 2, 4, 9, 11, 13, 15, 6, 8, 25, 27, 33, 31, 23, 28, 26, 29, 32, 30, 16, 18, 12, 10, 17, 7, 14, 21, 19, 24, 22, 20