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Lyndenlea

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The First Solutions
Chessboard size 19×19

1, 3, 5, 2, 4, 9, 13, 15, 17, 19, 7, 16, 18, 11, 6, 8, 10, 12, 14

Diagram of the first possible solution to the 19 Queens on a 19x19 chessboard problem