A PUZZLE WITH PAWNS

Place two pawns in the middle of the chessboard, one at Q `4` and the other at K `5`. Now, place the remaining fourteen pawns (sixteen in all) so that no three shall be in a straight line in any possible direction.

Note that I purposely do not say queens, because by the words "any possible direction" I go beyond attacks on diagonals. The pawns must be regarded as mere points in space—at the centres of the squares. See dotted lines in the case of No. `300`, "The Eight Queens."


主题:
组合数学 -> 组合几何学 -> 网格纸几何/格点几何
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