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A puzzle involving checkerboards: grids of squares alternating black and white in color, most commonly an 8x8 board.

35 votes
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How many queens can be on a chessboard without attacking each other?

Because: According to Wolfram-Alpha, there are One possible solution is: A list (and images!) of all
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42 votes
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How many chess pieces does it take to "cover" all spaces on a chessboard?

Yes. The minimum number of pieces required is 5. 5 queens can be places such that they cover every space on the board, as in the following example: There are 12 such arrangements, along with ro …
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