Go Baduk · Weiqi
Place stones, protect liberties and surround territory against a browser-local opponent. The same engine enforces capture, suicide prevention, positional superko and two-pass scoring.
Play, read, review — then repeat the exact weakness
Move ranking and Analysis use this page’s deterministic browser-local heuristic only. It is not KataGo, a professional engine score, global rank or remote AI review.
Choose Daily Reading, Sprint or Weak Review.
Edit a position, then inspect legal local candidates
Moves and passes
Position review without fake AI certainty
Review objective local facts from your moves: immediate captures, newly created atari groups, your placed group’s liberties, and self-atari warnings. This is not a professional engine evaluation.
Objective five-family tactical reading
The fixed pack uses capture, rescue, connection, atari and two-stone capture positions. Answers are defined by immediate board facts, not a remote AI score.
Ready.
SGF, backup and accessibility
SGF and backups are created on this device. No game record is uploaded by this page.
Groups live through open neighbors
Orthogonally connected stones form one group. When the last liberty disappears, the whole opposing group is removed immediately.
Illegal repeats never appear as moves
You cannot leave your newly placed group without a liberty unless the move captures first. Positional superko also blocks any stone placement that recreates a previous board position.
Play unsettled groups out before passing twice
After two consecutive passes the browser counts stones plus surrounded empty points, with 6.5 komi for White. There is no remote dead-stone adjudicator, so unresolved groups should be played out before both sides pass.
Learn on boards that fit real browser practice
9×9 keeps games compact and is the fixed Daily size. 13×13 gives more room for direction-of-play decisions without pretending the local heuristic AI is a professional 19×19 engine.
Study help stays visible
Hint, Undo or Restart marks the current game Assisted. Legal moves and scoring do not change; Clean wins simply separate unaided finishes from study sessions.
Browser-local strategy practice
Games, autosaves and Daily history stay on this device. There is no account, no global rank, no wagering, no chips, no prizes and no paid-random mechanic.