Go for two. A little space for a big idea.

Your first shared Go board

1. Open the shared board. The main button selects Same device and restores your local round.
2. Choose the size. Use the size menu after Vs computer. The default is 9 × 9; choose 13 × 13 or 19 × 19 for more space.
3. Choose your colors. Player 1 takes Black and starts. Player 2 takes White and receives 7.5 komi.
4. Take turns. Pass the device or use the same screen.

Changing size during a round asks before replacing the board. No private room is needed for this mode.

A group needs room to breathe

Black starts. Take turns placing one stone on an empty intersection of a 9 × 9, 13 × 13 or 19 × 19 board. A group consists of stones of one color connected horizontally or vertically. Diagonal stones are separate.

An empty point next to a group is a liberty. Fill the last liberty of an enemy group to capture all its stones. Your own group must have at least one liberty after captures: suicide is forbidden. Positional superko forbids a placement that repeats any earlier board position; passes are exempt.

The aim is to control more area. Five stones in a row has no special meaning in Go. There is no move limit or clock.

How you finish a game together

When neither player wants to place another stone, press Pass. Two consecutive passes open score review. Tap a dead group to fade its stones; tap it again to restore it. Small black and white squares show territory. Empty regions bordered by both colors, or neither, remain neutral.

Area scoring adds living stones and empty intersections bordered only by your color. White receives 7.5 extra points, called komi. Captured stones are displayed for reference and are not added to the total again. The higher score wins.

Both players must confirm the same score. Changing a dead-group selection clears both confirmations. If you disagree, either player can choose Resume play: the marked stones return, and the player whose turn follows the passes moves next. Play out the disputed capture, then pass again when ready.

On one device, confirm each color’s score separately. The button names the color whose confirmation is next. Resign ends the round after confirmation and awards the win to the other color.

Small points, comfortable controls

Click or tap where two lines meet. The gold dot marks the most recent stone. Pinch to enlarge the board and drag to explore it; this helps with the 19 × 19 grid on a phone.

With the board focused, use arrow keys to select an intersection and Enter or Space to place a stone. Home returns to the center. During score review, the same controls mark or restore a group.

Leave a game waiting here

Your local board saves in this browser, including passes, captures and score review. Same device and Vs computer keep separate rounds. Clearing site data removes these saves.

New round asks before replacing an unfinished local game and keeps your chosen board size. Try Go vs computer to practise on your own, or invite a friend to play from separate devices. The online guide compares all modes.