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1. Verfasser: Rammenstein, Tim
Format: Preprint
Veröffentlicht: 2025
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Online-Zugang:https://arxiv.org/abs/2508.00246
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author Rammenstein, Tim
author_facet Rammenstein, Tim
contents We study a combinatorial game derived from a problem in the German National Mathematics Competition. In this game, two players take turns removing numbers from a finite set of natural numbers, aiming to satisfy a certain divisibility condition. We introduce a generalized version of the original game, which depends on two parameters: the size of the initial number set and a fixed divisor. For both players, we identify a broad range of game variants in which they can force a win. In particular, we show that for even-sized sets, the second player to move can always win, while for many odd-sized cases, the first player to move has a winning strategy. A web implementation of the game demonstrates some of our results in practice.
format Preprint
id arxiv_https___arxiv_org_abs_2508_00246
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle On the Existence of Optimal Strategies in a Combinatorial Game
Rammenstein, Tim
Combinatorics
We study a combinatorial game derived from a problem in the German National Mathematics Competition. In this game, two players take turns removing numbers from a finite set of natural numbers, aiming to satisfy a certain divisibility condition. We introduce a generalized version of the original game, which depends on two parameters: the size of the initial number set and a fixed divisor. For both players, we identify a broad range of game variants in which they can force a win. In particular, we show that for even-sized sets, the second player to move can always win, while for many odd-sized cases, the first player to move has a winning strategy. A web implementation of the game demonstrates some of our results in practice.
title On the Existence of Optimal Strategies in a Combinatorial Game
topic Combinatorics
url https://arxiv.org/abs/2508.00246