Control more of the board than your opponent. Your score is the number of
your stones on the board plus the empty territory they surround.
Playing
Black moves first. Click an empty intersection to place a stone; players
then alternate. A placed stone never moves — though it can be captured.
Liberties & capture
A stone's liberties are its empty up/down/left/right neighbors.
Connected stones of the same color form a group that shares its
liberties. When an opponent fills a group's last liberty, the entire group
is captured and removed from the board.
Illegal moves
Suicide: you may not place a stone that would leave its
own group with no liberties — unless that same move captures enemy stones.
Ko: you may not play a move that recreates a previous
board position. This stops endless back-and-forth recapture.
Ending the game
When neither player wants to play on, each clicks Pass.
Two passes in a row end the game and begin scoring.
Scoring
Click any dead stones (stones that cannot escape capture)
to remove them — you and your opponent agree which. They fade with a red ✕.
Each empty region surrounded by only one color is that color's
territory, shown as small dots. Regions touching both colors
are neutral.
Final score = stones on the board + territory. White also receives
komi (7.5 points) to offset Black's first-move advantage.
Buttons
Pass — give up your turn · Resign — concede the
game · New Game — start over · Rules — this guide.