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Here is an odd little problem in military tactics that can be worker out advantageously on an ordinary checkerboard of sixty-four squares.  The puzzle is to place sixteen checkers on the board so that there will not be more than two in a row vertically, horizontally, or diagonally.  There is one stipulation.  The first two men must be placed on two of the four central squares of the board.

If all sixteen men are positioned correctly, a cannon ball coming from any possible direction could not hit more than two men.  It is a pretty and interesting puzzle, somewhat akin to the famous problem of placing eight queens on a checkerboard so no queen can be taken by another.

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