Cannibal Animal Games: A new variant of Tic-Tac-Toe

Jean Cardinal, Sébastien Collette, Hiro Ito, Matias Korman, Stefan Langerman, Hikaru Sakaidani, Perouz Taslakian

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


This paper presents a new partial two-player game, called the cannibal animal game, which is a variant of Tic-Tac-Toe. The game is played on the infinite grid, where in each round a player chooses and occupies free cells. The first player Alice can occupy a cell in each turn and wins if she occupies a set of cells, the union of a subset of which is a translated, reflected and/or rotated copy of a previously agreed upon polyomino P (called an animal). The objective of the second player Bob is to prevent Alice from creating her animal by occupying in each round a translated, reflected and/or rotated copy of P. An animal is a cannibal if Bob has a winning strategy, and a non-cannibal otherwise. This paper presents some new tools, such as the bounding strategy and the punching lemma, to classify animals into cannibals or non-cannibals. We also show that the pairing strategy works for this problem.

Original languageEnglish
Pages (from-to)265-271
Number of pages7
JournalJournal of information processing
Issue number3
Publication statusPublished - 2015
Externally publishedYes


  • Bounding strategy
  • Cannibal animal
  • Harary’s generalized Tic-Tac-Toe
  • Pairing strategy
  • Partial game
  • Polyomino

ASJC Scopus subject areas

  • Computer Science(all)


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