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Nim is a well-known combinatorial game with several variants, e.g., Delete Nim and Variant Delete Nim. In Variant Delete Nim, the player deletes one of the two heaps of stones and splits the other heap on his/her turn. In this paper, we…

Combinatorics · Mathematics 2023-01-31 Tomoaki Abuku , Ko Sakai , Masato Shinoda , Koki Suetsugu

Given an impartial combinatorial game G, we create a class of related games (CIS-G) by specifying a finite set of positions in G and forbidding players from moving to those positions (leaving all other game rules unchanged). Such…

Combinatorics · Mathematics 2012-01-04 Scott M. Garrabrant , Eric J. Friedman , Adam Scott Landsberg

Domineering is a combinatorial game played on a subset of a rectangular grid between two players. Each board position can be put into one of four outcome classes based on who the winner will be if both players play optimally. In this note,…

Combinatorics · Mathematics 2013-05-16 Gabriel C. Drummond-Cole

Combinatorial Game Theory is a branch of mathematics and theoretical computer science that studies sequential 2-player games with perfect information. Normal play is the convention where a player who cannot move loses. Here, we generalize…

Computer Science and Game Theory · Computer Science 2023-10-31 Prem Kant , Urban Larsson , Ravi K. Rai , Akshay V. Upasany

Combinatorial games are two-player games of pure strategy where the players, usually called Left and Right, move alternately. In this paper, we introduce Cheating Robot games. These arise from simultaneous-play combinatorial games where one…

Combinatorics · Mathematics 2022-02-11 Melissa A. Huggan , Richard J. Nowakowski

We introduce Row Impartial Terminus (RIT), an impartial combinatorial game played on integer partitions. We show that any position in RIT can be uniquely decomposed into a core and a remnant. Our central result is that the Conway pair of…

Combinatorics · Mathematics 2025-09-04 Eric Gottlieb , Dawood Khatana , Matjaž Krnc , Peter Muršič , Ismael Qureshi

We consider Subtraction Nim, where two players have exactly the same options, but which is partizan in the sense that at the game ending, a partizan rule is applied for the decision of the winner. We consider the following example: Let $S$…

Combinatorics · Mathematics 2026-05-29 Hiyu Inoue , Shin-nosuke Kadowaki , Shun-ichi Kimura , Haruki Wada

We define a two-player combinatorial game in which players take alternate turns; each turn consists on deleting a vertex of a graph, together with all the edges containing such vertex. If any vertex became isolated by a player's move then…

Combinatorics · Mathematics 2016-08-03 Richard Adams , Janae Dixon , Jennifer Elder , Jamie Peabody , Oscar Vega , Karen Willis

By treating combinatorial games as dynamical systems, we are able to address a longstanding open question in combinatorial game theory, namely, how the introduction of a "pass" move into a game affects its behavior. We consider two well…

Combinatorics · Mathematics 2012-04-17 Rebecca E. Morrison , Eric J. Friedman , Adam S. Landsberg

A move in the game of nim consists of taking any positive number of tokens from a single pile. Suppose we add the class of moves of taking a nonnegative number of tokens jointly from all the piles. We give a complete answer to the question…

Combinatorics · Mathematics 2007-05-23 Uri Blass , Aviezri S. Fraenkel , Romina Guelman

We study a variant of 3-pile Nim in which a move consists of taking tokens from one pile and, instead of removing then, topping up on a smaller pile provided that the destination pile does not have more tokens then the source pile after the…

Combinatorics · Mathematics 2016-05-12 Nhan Bao Ho

For normal play, impartial games, we define penults as those positions in which every option results in an immediate win for the other player. We explore the number of tokens in penults of two positional games, Impartial Tic and Impartial…

Combinatorics · Mathematics 2024-08-06 Boris Alexeev , Paul Ellis , Michael Richter , Thotsaporn Aek Thanatipanonda

Euclid is a well known two-player impartial combinatorial game. A position in Euclid is a pair of positive integers and the players move alternately by subtracting a positive integer multiple of one of the integers from the other integer…

Combinatorics · Mathematics 2012-02-22 Grant Cairns , Nhan Bao Ho

We consider a game with two piles, in which two players take turn to add $a$ or $b$ chips ($a$, $b$ are not necessarily positive) randomly and independently to their respective piles. The player who collects $n$ chips first wins the game.…

Combinatorics · Mathematics 2019-03-11 Ho-Hon Leung , Thotsaporn "Aek'' Thanatipanonda

The Rock-Scissors-Paper game has been studied to account for cyclic behaviour under various game dynamics. We use a two-person parametrised version of this game. The cyclic behaviour is observed near a heteroclinic cycle, in a heteroclinic…

Dynamical Systems · Mathematics 2020-01-01 Liliana Garrido-da-Silva , Sofia B. S. D. Castro

Given integer $n$ and $k$ such that $0 < k \leq n$ and $n$ piles of stones, two player alternate turns. By one move it is allowed to choose any $k$ piles and remove exactly one stone from each. The player who has to move but cannot is the…

Combinatorics · Mathematics 2023-04-14 V. Gurvich , D. Martynov , V. Maximchuk , M. Vyalyi

Toral introduced so-called cooperative Parrondo games, in which there are N players (3 or more) arranged in a circle. At each turn one player is randomly chosen to play. He plays either game A or game B, depending on the strategy. Game A…

Probability · Mathematics 2015-02-27 S. N. Ethier , Jiyeon Lee

We research a combinatorial game based on the Cookie Monster problem called the Cookie Monster game that generalizes the games of Nim and Wythoff. We also propose several combinatorial games that are in between the Cookie Monster game and…

History and Overview · Mathematics 2014-07-08 Tanya Khovanova , Joshua Xiong

This paper studies sequential quantum games under the assumption that the moves of the players are drawn from groups and not just plain sets. The extra group structure makes possible to easily derive some very general results characterizing…

Quantum Physics · Physics 2025-03-14 Theodore Andronikos

Consider the following game between a random player R and a deterministic player D. There is a pile of n elements at the beginning. The rules for playing are as follows: In each turn of R, if the pile contains exactly m elements, R removes…

Combinatorics · Mathematics 2024-03-26 Yehonatan Fridman