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In page Gomoku:
"However, neither the theoretical values of all legal positions, nor the opening rules such as Swap2 used by the professional gomoku players have been solved yet, so the topic of gomoku artificial intelligence is still a challenge for computer scientists, such as the problem on how to improve the gomoku algorithms to make them more strategic and competitive. Most state-of-the-art gomoku algorithms are based on the alpha-beta pruning framework.[citation needed]