Getting started
Go is an ancient board game for two players. You take turns placing black and white stones to surround territory, and whoever surrounds more wins.
This app counts the final board from a photo. It reads the position stone by stone, then you fix any misreads and mark dead groups. It draws the result on your photo under Japanese or Chinese rules.
Everything runs in your browser. Photos never leave your device.
Built with ♥ by Ray.
Choose scoring rules
What’s the difference?
- Japanese (territory): count the empty points you surround, plus prisoners: stones you captured during play and dead stones on the board. Komi is 6.5.
- Chinese (area): count your living stones plus the empty points you surround. Captures don’t matter. Komi is 7.5.
Both systems agree on the winner in all but rare edge cases. Pick whichever your group plays.
Choose a photo
Shoot from directly above with the whole board in frame. Even lighting improves detection.
Align the grid
Drag each handle onto a corner intersection. The projected lines should sit on the board’s grid.
Check the stones
Tap an intersection to cycle it: empty, black, white.
Count captures
Japanese scoring adds prisoners to territory. Count the stones each player captured during the game. Players keep them in the bowl lids.
Black captures are the white stones Black took, and the other way around. Dead stones you marked are added automatically.
Set komi
Komi compensates White for going second. 6.5 is standard under Japanese rules.