Play Go online

Black plays first. Adjacent stones form groups: a group with no liberties is captured. Suicide and immediate ko recapture are illegal. Choose 9, 13 or 19 lines and a scoring preset before starting: Chinese area scoring with White +7.5 points (Black gives 3¾ zi), or Japanese/Korean territory plus prisoners with White +6.5. Japanese and Korean komi are intentionally the same. Two consecutive passes open scoring: mark entire dead groups, mark seki eyes or disputed empty regions as neutral, then both players confirm the same score. Any change cancels both confirmations; either player can resume. Chinese uses positional superko; Japanese/Korean use simple ko and a third repeated board ends without result. This is an agreement-based digital implementation, not automatic professional life-and-death adjudication. No handicap stones or clock. Local AI is for practice and accepts your scoring marks; it is not a life-and-death judge.