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Preprints, Working Papers, ... Year : 2020

Quixo Is Solved


Quixo is a two-player game played on a 5 × 5 grid where the players try to align five identical symbols. Specifics of the game require the usage of novel techniques. Using a combination of value iteration and backward induction, we propose the first complete analysis of the game. We describe memory-efficient data structures and algorithmic optimizations that make the game solvable within reasonable time and space constraints. Our main conclusion is that Quixo is a Draw game. The paper also contains the analysis of smaller boards and presents some interesting states extracted from our computations.
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Dates and versions

hal-02981564 , version 1 (28-10-2020)


  • HAL Id : hal-02981564 , version 1


Satoshi Tanaka, François Bonnet, Sébastien Tixeuil, Yasumasa Tamura. Quixo Is Solved. 2020. ⟨hal-02981564⟩
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