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arXiv 1202.3186math.CO
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Wythoff对策保持P-位置的两个变种

Two variants of Wythoff's game preserving its P-positions

Nhan Bao Ho

摘要:

我们提出了两个变种的Wythoff的游戏。第一个游戏是Wythoff游戏的一个限制,其中如果两个条目不相等,则不允许从较小的一堆中移除代币。第二个游戏是Wythoff游戏的扩展,通过相邻移动获得,允许玩家从较小的一堆中取出k个代币,并从另一堆中取出l个代币,前提是l < k。我们表明,这两个游戏保持Wythoff的游戏的P-位置。这解决了Duchene、Fraenkel、Nowakowski和Rigo提出的一个问题。我们给出的公式,这些位置的Sprague-Grundy值为1。我们还证明了关于Sprague-Grundy函数的几个结果。

英文摘要:

We present two variants of Wythoff's game. The first game is a restriction of Wythoff's game in which removing tokens from the smaller pile is not allowed if the two entries are not equal. The second game is an extension of Wythoff's game obtained by adjoining a move allowing players to remove k tokens from the smaller pile and l tokens from the other pile provided l < k. We show that both games preserve the P-positions of Wythoff's game. This resolves a question raised by Duchene, Fraenkel, Nowakowski and Rigo. We give formulas for those positions which have Sprague-Grundy value 1. We also prove several results on the Sprague-Grundy functions.

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