Information Compression and Performance Evaluation of Tic-Tac-Toe’s Evaluation Function Using Singular Value Decomposition

Naoya Fujita, Hiroshi Watanabe

研究成果: Article査読

抄録

We approximated the evaluation function for the game Tic-Tac-Toe by singular value decomposition (SVD) and investigated the effect of approximation accuracy on winning rate. We first prepared the perfect evaluation function of Tic-Tac-Toe and performed low-rank approximation by considering the evaluation function as a ninth-order tensor. We found that we can reduce the amount of information of the evaluation function by 70% without significantly degrading the performance. Approximation accuracy and winning rate were strongly correlated but not perfectly proportional. We also investigated how the decomposition method of the evaluation function affects the performance. We considered two decomposition methods: simple SVD regarding the evaluation function as a matrix and the Tucker decomposition by higher-order SVD (HOSVD). At the same compression ratio, the strategy with the approximated evaluation function obtained by HOSVD exhibited a significantly higher winning rate than that obtained by SVD. These results suggest that SVD can effectively compress board game strategies and an optimal compression method that depends on the game exists.

本文言語English
論文番号034802
ジャーナルJournal of the Physical Society of Japan
92
3
DOI
出版ステータスPublished - 2023 3月 15

ASJC Scopus subject areas

  • 物理学および天文学一般

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