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arXiv 0710.3632math.CO
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2-移动大小模仿数受限的堆尼姆

2-pile Nim with a Restricted Number of Move-size Imitations

Urban Larsson

摘要:

我们研究了2-堆Nim组合博弈的一个变形。像2堆尼姆一样移动,但有以下限制:假设前一个玩家刚刚从较短的一堆中移走了$x>0$代币(如果它们具有相同的高度,则可以移走任何一堆)。如果下一个玩家现在从较大的一堆中移走$x$代币,那么他模仿他的对手。对于预定的自然数$p$,根据游戏规则,任何一个玩家都不允许模仿他的对手超过$p-1$连续移动。我们证明,这个游戏的策略非常类似于Wythoff尼姆的一个变体-一个变体与$p-1$对角线位置上的阻挡动作。事实上,我们给出了一个稍微更一般的结果,在这个结果中,我们放宽了什么是模仿的概念。

英文摘要:

We study a variation of the combinatorial game of 2-pile Nim. Move as in 2-pile Nim but with the following constraint: Suppose the previous player has just removed say $x>0$ tokens from the shorter pile (either pile in case they have the same height). If the next player now removes $x$ tokens from the larger pile, then he imitates his opponent. For a predetermined natural number $p$, by the rules of the game, neither player is allowed to imitate his opponent on more than $p-1$ consecutive moves. We prove that the strategy of this game resembles closely that of a variant of Wythoff Nim--a variant with a blocking manoeuvre on $p-1$ diagonal positions. In fact, we show a slightly more general result in which we have relaxed the notion of what an imitation is.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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