A two-player game of strategy game, devised by Piet Hein, that is essentially a two-dimensional version of Nim. Though the game is non-trivial, the first player can always win, at least in the 5-by-5 matrix version, by choosing the center piece and symmetrically mirroring the second player's moves. Players alternate taking pieces away from a 5 × 5 grid as many contiguous pieces as desired from a single row or column.
Related category GAMES AND PUZZLES
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