Go
Play Go on a 9×9 board against a rule-based AI opponent. Simple rules, deep strategy — no sign-up required.
How to Play Go
- Black moves first. Click any empty intersection to place your stone.
- Surround an opponent's group of stones on all sides to capture it — captured stones are removed from the board.
- Surround empty intersections to claim territory. The player who controls more territory and captures wins.
- Click Pass if you have no useful move; two consecutive passes end the game and trigger scoring.
Frequently Asked Questions
- What board size is used?
- The game uses a 9×9 board — the ideal size for learning Go without the length of a full 19×19 game.
- What is a liberty?
- A liberty is any empty intersection directly adjacent (not diagonal) to a stone or group. A group with no liberties is captured and removed.
- What is the ko rule?
- Ko prevents an immediately repeated board position. If capturing a stone would recreate the previous position, that capture is illegal until another move is made elsewhere.
- What CPU strategy does the AI use?
- The AI uses a rule-based engine that prioritises capturing groups with few liberties, connecting its own stones, and securing corners and edges.