Go 9×9

Go 9×9: logical-Go strategy on an original 9×9 board. Black starts; place an empty intersection or pass. Connected groups need liberties: clear opposing zero-liberty groups before own groups. Non-repeating multi-stone self-capture allowed; positional superko rejects any earlier board. Pass twice consecutively to score remaining stones plus singly surrounded empty regions. White adds 7.5 komi. Captures are statistics, not extra points. Play out disputed/dead groups before passing; no automatic dead-stone removal or handicap. Separate confirmed resignation.

Solo same-rule bounded capture/atari/liberty/area bot, exact local and online two humans. Native black/cream stones capped at 40 CSS px, group liberties/capture/territory previews, separate 48px controls outside the board, zoom, solo Undo and revision-safe cloud resume, original audio and English/PT Help/rematch.

Full history/superko retained while online wire snapshots use 64-action windows. Public legal replay/terminal acknowledgment; 60-second turn forfeit. Departure/background/deadlines abort without result. Casual client-host outcomes unverified, no reconnect/migration. Standalone saves in-memory, not offline installation. Portrait preferred; landscape supported.

• Initial WASD/arrows select; Initial Space/Enter/Numpad Enter places at the first press; F is an alias
• Mouse/touch: completed click/tap on a legal point places directly; invalid/forbidden points only preview
• Local Black: WASD/Space/F/H; White: arrows/Enter/Numpad Enter/Right Shift
• H plans a hint without placing; U undoes solo; Z zooms; native Place remains available
• Escape closes Help first; Escape pauses/resumes solo/local; P remains Pass; M mutes; F1 opens Help; online Help stays live
• Native focus, IME, modifiers and held keys preserve ordinary behavior; canceled contacts/lifecycle changes never place
• Portrait preferred; landscape supported; controls remain outside the board
• R opens the existing resignation confirmation; Escape cancels it; it never resigns immediately