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rooks chessboard problem

In how many ways can one place 4 rooks on a chessboard so that they do not threaten each other? - Quora

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In how many ways can one place 4 rooks on a chessboard so that they do not threaten each other? - Quora
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In how many ways can one place 4 rooks on a chessboard so that they do not threaten each other? - Quora
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In how many ways can one place 4 rooks on a chessboard so that they do not threaten each other? - Quora
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