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Lyndenlea

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The First Solutions
Chessboard size 25×25

1, 3, 5, 2, 4, 9, 11, 13, 15, 19, 21, 24, 20, 25, 23, 6, 8, 10, 7, 14, 16, 18, 12, 17, 22

Diagram of the first possible solution to the 25 Queens on a 25x25 chessboard problem