Abstract:E. Duchêne et al investigate games whose sets of allowed moves are subsets of Wythoff's one, and whose set of P-positions is exactly Wythoff's sequence. Their results show that such a game does not exist. In this paper, we find a pair of games, one is the restricted version of the other, such that they have the same set of P-positions. We also find another pair of games, one is the restricted version of the other, such that they do not have the same set of P-positions. This means that the preservation of P-pos… Show more
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