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Given two finite sets of integers $S\subseteq\NNN\setminus\{0\}$ and $D\subseteq\NNN\setminus\{0,1\}$,the impartial combinatorial game $\IMARK(S,D)$ is played on a heap of tokens. From a heap of $n$ tokens, each player can moveeither to a…

Discrete Mathematics · Computer Science 2015-11-10 Eric Sopena

Let $S$ be a set of positive integers, and let $D$ be a set of integers larger than $1$. The game $i$-Mark$(S,D)$ is an impartial combinatorial game introduced by Sopena (2016), which is played with a single pile of tokens. In each turn, a…

Combinatorics · Mathematics 2021-07-01 Oren Friman , Gabriel Nivasch

We define and give results on the game NecklaceNim NN($n$,$k$) which is PathNim PN($n$,$k$) with an additional move allowed on the end vertices. This game arises as a sub-game in the context of solving CircularNim CN($n$,$k$) when $k-2$…

Combinatorics · Mathematics 2026-04-14 Balaji R. Kadam , Silvia Heubach , Matthieu Dufour

We analyze the Sprague-Grundy functions for a class of almost disjoint selective compound games played on Nim heaps. Surprisingly, we find that these functions behave chaotically for smaller Sprague-Grundy values of each component game yet…

Combinatorics · Mathematics 2018-02-27 Calvin Beideman , Matthew Bowen , Necati Alp Muyesser

We study the applicability of quantum algorithms in computational game theory and generalize some results related to Subtraction games, which are sometimes referred to as one-heap Nim games. In quantum game theory, a subset of Subtraction…

Quantum Physics · Physics 2020-06-15 Dmitry Kravchenko , Kamil Khadiev , Danil Serov , Ruslan Kapralov

We consider a two player simultaneous-move game where the two players each select any permissible $n$-sided die for a fixed integer $n$. A player wins if the outcome of his roll is greater than that of his opponent. Remarkably, for $n>3$,…

Probability · Mathematics 2018-10-23 Artem Hulko , Mark Whitmeyer

In this paper, we study an impartial game called Delete Nim. In this game, there are two heaps of stones. The player chooses one of the heaps and delete the other heap. Next, she takes away one stone from the chosen heap and optionally…

Combinatorics · Mathematics 2019-08-22 Koki Suetsugu , Tomoaki Abuku

A Subtraction-Division game is a two player combinatorial game with three parameters: a set S, a set D, and a number n. The game starts at n, and is a race to say the number 1. Each player, on their turn, can either move the total to n-s…

Combinatorics · Mathematics 2012-06-05 Elizabeth Kupin

A partially parallel dynamical noisy binary choice (Ising) game in discrete time of $N$ players on complete graphs with $k$ players having a possibility of changing their strategies at each time moment called $k$-flip Ising game is…

Computer Science and Game Theory · Computer Science 2025-12-12 Kovalenko Aleksandr , Andrey Leonidov

The authors introduce the impartial game of the generalized Ry\=u\=o Nim, a variant of the classical game of Wythoff Nim. In the latter game, two players take turns in moving a single queen on a large chessboard, attempting to be the first…

Combinatorics · Mathematics 2017-11-07 Ryohei Miyadera , Yuki Tokuni , Yushi Nakaya , Masanori Fukui , Tomoaki Abuku , Koki Suetsugu

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

We investigate the Sprague-Grundy sequences for two normal-play impartial games based on arithmetic functions, first described by Iannucci and Larsson in \cite{sum}. In each game, the set of positions is N (natural numbers). In saliquant,…

Number Theory · Mathematics 2023-09-06 Paul Ellis , Jason Shi , Thotsaporn Aek Thanatipanonda , Andrew Tu

In this note, we investigate combinatorial games where both players move randomly (each turn, independently selecting a legal move uniformly at random). In this model, we provide closed-form expressions for the expected number of turns in a…

Combinatorics · Mathematics 2024-01-31 Pat Devlin , Paulina Trifonova

We introduce a variant of Wythoff's Game that we call $m$-Modular Wythoff's Game. In the original Wythoff's Game, players can take a positive number of tokens from one pile, or they can take a positive number of tokens from both piles if…

Combinatorics · Mathematics 2024-02-22 Tanya Khovanova , Shuheng Niu

Subtraction games is a class of combinatorial games. It was solved since the Sprague-Grundy Theory was put forward. This paper described a new algorithm for subtraction games. The new algorithm can find win or lost positions in subtraction…

Computer Science and Game Theory · Computer Science 2012-08-31 Guanglei He , Zhihui Qin

We study algorithms for solving Subtraction games, which sometimes are referred to as one-heap Nim games. We describe a quantum algorithm which is applicable to any game on DAG, and show that its query compexity for solving an arbitrary…

Quantum Physics · Physics 2018-08-13 Kamil Khadiev , Dmitry Kravchenko

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

In a recent arXiv-manuscript Fox studies infinite subtraction games with a finite (ternary) and aperiodic Sprague-Grundy function. Here we provide an elementary example of a game with the given properties, namely the game given by the…

Combinatorics · Mathematics 2015-03-26 Urban Larsson

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

The $q$-round Renyi-Ulam pathological liar game with $k$ lies on the set $[n]:=\{1,...,n\}$ is a 2-player perfect information zero sum game. In each round Paul chooses a subset $A\subseteq [n]$ and Carole either assigns 1 lie to each…

Combinatorics · Mathematics 2010-11-12 Robert B. Ellis , Vadim Ponomarenko , Catherine H. Yan