Go
9×9 practice · computer or two players
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You play Black; the computer plays White. You go first. Leaving this screen resets the game.
How to play
Computer play is the default and runs locally without an API key. OX searches outcomes; Gomoku uses attack and defense, while Go is a basic practice opponent prioritizing captures and liberties. Undo removes both the computer reply and your move. In Go, the computer accepts your pass to end play and show the area estimate.
Practice Go on a 9×9 board. Black starts. Capture groups without liberties. Suicide and repeating any earlier board position are prohibited. Two consecutive passes end play. The estimate counts stones and surrounded empty points, with 6.5 komi for White. Dead stones are not detected automatically; play out captures before ending. This is not tournament scoring.