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Lyndenlea

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The First Solutions
Chessboard size 54×54

1, 3, 5, 2, 4, 9, 11, 13, 15, 6, 8, 19, 7, 22, 10, 25, 27, 29, 31, 40, 42, 44, 41, 49, 51, 53, 43, 52, 48, 45, 54, 46, 50, 47, 14, 18, 30, 21, 26, 32, 17, 20, 28, 12, 16, 23, 37, 34, 38, 24, 39, 36, 33, 35

Diagram of the first possible solution to the 54 Queens on a 54x54 chessboard problem