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Place all the chessmen on the board in such a way that each man is under threat by exactly one enemy man.
60.13N / 25.01E
Chessmen.. that is, all 32 pieces of a chess set? With pawns only this would admittedly be rather trivial, eg. black a7, b7, a5, b5, g7, h7, g5, h5; white a6, b6, a4, b4, g6, h6, g4, h4.
