Light moves first. Place a disc so that one or more enemy discs sit in a straight line between it and another of your discs — across, down or diagonally. Every bracketed disc flips to your colour.
You must flip at least one disc. The small rings show where you can play. If you have no legal move, tap the board to pass; if neither side can move the game ends.
The side with more discs at the end wins. Corners can never be flipped — they are worth fighting for.
Undo takes back your last turn. Games save automatically — leave and pick up later.
Online: choose Online friend, create a game and share the code or link. Your friend opens it and plays from their own device.
Keyboard: arrow keys move around the board, Enter or Space places a disc.