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Mathematics  1998 

Multivision: an intractable impartial game with a linear winning strategy

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Abstract:

Something is definitely wrong. If the game has a linear winning strategy, then it is tractable. What's going on? Well, we describe a two-person game which has a definite winner, that is, a player who can force a win in a finite number of moves, and we determine the winner in linear time. Moreover, the winner's winning moves can be computed in linear time, yet the game is highly intractable. In particular, at each step, except the very last ones, a player can make the length of play arbitrarily long. Unfortunately, the space for this summary is too small to contain a proof that these properties are not contradictory.

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