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Lyndenlea

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The First Solutions
Chessboard size 51×51

1, 3, 5, 2, 4, 9, 11, 13, 15, 6, 8, 19, 7, 22, 10, 25, 27, 29, 31, 39, 41, 43, 40, 47, 50, 48, 51, 42, 44, 46, 49, 45, 16, 26, 23, 12, 30, 18, 14, 17, 20, 24, 21, 28, 34, 36, 38, 33, 35, 37, 32

Diagram of the first possible solution to the 51 Queens on a 51x51 chessboard problem