Play Weiqi

Play a normal Chinese-rules game on 9×9, 13×13, or 19×19 against a local AI, as Black or White: captures do not end the game. Click an empty intersection; after your move the AI replies. Undo takes back your last move and the reply. Pass when you are done: two consecutive passes end the game, show an area count, and let you mark dead stones before the final count.