Rules of Go
- ⚫ You play Black and move first. White is the computer.
- 👇 Tap an intersection to place a stone. Stones don't move once placed.
- 🌀 A group of connected stones is captured when all its adjacent empty points (liberties) are filled.
- 🚫 You can't play a move that leaves your own stone with zero liberties, unless it captures an opponent's group.
- 🔄 Ko rule: you can't immediately recapture a single stone that just captured yours (prevents infinite loops).
- ✋ Both players pass consecutively to end the game. Territory is then counted.
- 🏆 Score = your territory + your captures. White gets 7.5 points komi (compensation for going second).
Play async with a friend
After every move the URL updates automatically with the complete game state encoded in the fragment.
Click 🔗 Link and send it to your opponent. They open the link, see the board exactly as you left it, make their move, then copy the new URL back to you.
The URL is the save file. Bookmark it to resume a game later. No server, no login, no account — just a link.