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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

The game of Nim as played on graphs was introduced in Nim on Graphs I and extended in Nim on Graphs II by Masahiko Fukuyama. His papers detail the calculation of Grundy numbers for graphs under specific circumstances. We extend these…

Combinatorics · Mathematics 2010-10-08 Lindsay Erickson

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

Chocolate bar games are variants of the game of Nim in which the goal is to leave your opponent with the single bitter part of the chocolate bar. The rectangular chocolate bar game is a thinly disguised form of classical multi-heap Nim. In…

Combinatorics · Mathematics 2017-11-15 Ryohei Miyadera , Shunsuke Nakamura , Masanori Fukui

We determine the full nim-value structure of additive subtraction games in the {\em primitive quadratic} regime. The problem appears in Winning Ways by Berlekamp et al. in 1982; it includes a closed formula, involving Beatty-type {\em…

Combinatorics · Mathematics 2026-03-31 Urban Larsson , Hikaru Manabe

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

We consider mis\`{e}re Nim as a normal-play game obtained from Nim by removing the terminal position. While explicit formulas are known for the Sprague-Grundy functions of Nim and Welter's game, no explicit formula is known for that of…

Combinatorics · Mathematics 2021-03-29 Yuki Irie

We generalize the results and conjectures of Tam\'{a}s Lengyel, showing that the \textsc{nim}-values of a large class of two-dimensional subtraction-transfer games are periodic. These are impartial, normal-play games with two piles of…

Combinatorics · Mathematics 2026-05-25 Alon Danai , Paul Ellis , Thotsaporn Aek Thanatipanonda

\textsc{cut} is a class of partition games played on a finite number of finite piles of tokens. Each version of \textsc{cut} is specified by a cut-set $\mathcal{C}\subseteq\mathbb{N}$. A legal move consists of selecting one of the piles and…

Combinatorics · Mathematics 2022-03-07 Paul Ellis , Thotsaporn Aek Thanatipanonda

Subtraction games are a classical topic in Combinatorial Game Theory. A result of Golomb~(1966) shows that every subtraction game with a finite move set has an eventually periodic nim-sequence, but the known proof yields only an exponential…

Combinatorics · Mathematics 2026-03-18 Anjali Bhagat , Urban Larsson , Hikaru Manabe , Takahiro Yamashita

We created two dimensional hexagonal cellular automata to obtain complexity. Considering the game of life rules, Wolfram's works about life-like structures and John von Neumann's self-replication, self-maintenance, self-reproduction…

Cellular Automata and Lattice Gases · Physics 2023-02-28 Vural Erdogan

We have proposed two new evolutionary rules on spatio-iterated games that is not mimic evolution of strategies, and mainly discussed the Prisoner's Dilemma game \cite{toyota2} by the two evoutionary rules \cite{toyota3}. In this paper we…

Chaotic Dynamics · Physics 2007-05-23 Norihito Toyota

The ordinary game of Nim has a long history and is well-known in the area of combinatorial game theory. The solution to the ordinary game of Nim has been known for many years and lends itself to numerous other solutions to combinatorial…

Combinatorics · Mathematics 2012-08-29 Lindsay Erickson , Warren Shreve

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

Subtraction games are a class of impartial combinatorial games whose positions correspond to nonnegative integers and whose moves correspond to subtracting one of a fixed set of numbers from the current position. Though they are easy to…

Combinatorics · Mathematics 2014-07-11 Nathan Fox

In areas as diverse as contemporary art, play structures, climbing equipment, and modular construction toys, we see the presence of building block-like polyhedral complexes, which are generalizations of the pieces in the game Tetris. We…

Combinatorics · Mathematics 2026-02-27 Bert Dobbelaere , Peter Kagey , Drake Thomas , Andrés R. Vindas-Meléndez

We introduce a new generalization of Wythoff Nim using three piles of stones. We show that its P-positions have finite difference properties and produce a partition of positive integers. Further, we give a conjecture that the P-positions…

Combinatorics · Mathematics 2024-12-25 Shigeki Akiyama

In this paper, we consider a game beginning with a multiset of elements from a group. On a move, two elements are replaced by their sum. This is a no strategy game, and can be modeled as a graded poset with the rank of a node equal to the…

Combinatorics · Mathematics 2018-07-02 Caleb Ji

We consider a subtraction Nim with subtraction set {s_1,s_2,s_3={2,4n,4n+2}, where n is a positive integer such that n >= 3. We do not treat the case that n=1 or n=2 in this article. We show that this game satisfies the reverse-mex property…

Combinatorics · Mathematics 2026-05-15 Urban Larsson , Hikaru Manabe , Ryohei Miyadera

Recently DRAM-based PIMs (processing-in-memories) with unmodified cell arrays have demonstrated impressive performance for accelerating AI applications. However, due to the very restrictive hardware constraints, PIM remains an accelerator…

Hardware Architecture · Computer Science 2023-10-17 Jaewoo Park , Sugil Lee , Jongeun Lee