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In two-player games on graphs, the players move a token through a graph to produce an infinite path, which determines the winner of the game. Such games are central in formal methods since they model the interaction between a…

Computer Science and Game Theory · Computer Science 2023-06-22 Milad Aghajohari , Guy Avni , Thomas A. Henzinger

Here, we present a variant of Nim with two piles. In the first pile, we have stones with a weight of 1, and in the second pile, we have stones with a weight of -2. Two Players take turns to take stones from one of the piles, and the total…

Combinatorics · Mathematics 2023-12-06 Shoei Takahashi , Hikaru Manabe , Aoi Murakami , Ryohei Miyadera

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

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

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 study biased {\em orientation games}, in which the board is the complete graph $K_n$, and Maker and Breaker take turns in directing previously undirected edges of $K_n$. At the end of the game, the obtained graph is a tournament. Maker…

Combinatorics · Mathematics 2011-07-12 Ido Ben-Eliezer , Michael Krivelevich , Benny Sudakov

A finite impartial game is a two-player game in which the players take turns making moves and the game ends after finitely many moves. In this paper, we study a class of finite impartial games introduced by H.~Lenstra, which we call coin…

Combinatorics · Mathematics 2026-02-17 Masao Ishikawa , Toyokazu Ohmoto , Hiroyuki Tagawa , Yoshiki Takayama

We show that the winning positions of a certain type of two-player game form interesting patterns which often defy analysis, yet can be computed by a cellular automaton. The game, known as {\em Blocking Wythoff Nim}, consists of moving a…

Combinatorics · Mathematics 2015-06-05 Matthew Cook , Urban Larsson , Turlough Neary

Ultimate Tic-Tac-Toe is a variant of the well known tic-tac-toe (noughts and crosses) board game. Two players compete to win three aligned "fields", each of them being a tic-tac-toe game. Each move determines which field the next player…

Computer Science and Game Theory · Computer Science 2020-06-09 Guillaume Bertholon , Rémi Géraud-Stewart , Axel Kugelmann , Théo Lenoir , David Naccache

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

In this note we discuss a theory of combinatorial games that involve transmitting the moves through a noisy channel that can introduce errors during the transmission. Players are aware of this interference and incorporate this variable into…

Combinatorics · Mathematics 2020-12-15 Nicolas Capitelli , Melina Privitelli

We consider random-turn positional games, introduced by Peres, Schramm, Sheffield and Wilson in 2007. A $p$-random-turn positional game is a two-player game, played the same as an ordinary positional game, except that instead of alternating…

Combinatorics · Mathematics 2014-08-26 Asaf Ferber , Michael Krivelevich , Gal Kronenberg

In this paper we study a single player game consisting of $n$ black checkers and $m$ white checkers, called shifting the checkers. We have proved that the minimum number of steps needed to play the game for general $n$ and $m$ is $nm + n +…

Data Structures and Algorithms · Computer Science 2013-07-18 Lei Wang , Xiaodong Wang , Yingjie Wu , Daxin Zhu

We study an impartial achievement game introduced by Anderson and Harary. The game is played by two players who alternately select previously unselected elements of a finite group. The game ends when the jointly selected elements generate…

Group Theory · Mathematics 2024-02-10 Bret J. Benesh , Dana C. Ernst , Nandor Sieben

The Grundy number of an impartial game G is the size of the unique Nim heap equal to G. We introduce a new variant of Nim, Restricted Nim, which restricts the number of stones a player may remove from a heap in terms of the size of the…

Combinatorics · Mathematics 2007-05-23 Lionel Levine

We study impartial take away games on 2 unordered piles of finite nonnegative numbers of tokens $(x,y)$. Two players alternate in removing at least one and at most all tokens from the respective piles, according to certain rules, and the…

Combinatorics · Mathematics 2012-06-21 Urban Larsson

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

We introduce and study Minkowski games. These are two player games, where the players take turns to chose positions in $\mathbb{R}^d$ based on some rules. Variants include boundedness games, where one player wants to keep the positions…

Computer Science and Game Theory · Computer Science 2016-11-28 Stéphane Le Roux , Arno Pauly , Jean-François Raskin

A poset game is a two-player game played over a partially ordered set (poset) in which the players alternate choosing an element of the poset, removing it and all elements greater than it. The first player unable to select an element of the…

Computational Complexity · Computer Science 2015-03-20 Daniel Grier

Here, we present a variant of the sliding coins game. Two coins are placed on distinct squares of a semi-infinite linear board with squares numbered $0, 1, 2, dots, $. Two players take turns and move a coin to a lower unoccupied square.…

Combinatorics · Mathematics 2025-04-29 Ryohei Miyadera , Hikaru Manabe , Unchon Lee