Players take turns placing disks on the board with their assigned colour facing up. During a play, any disks of the opponent's colour that are in a straight line and bounded by the disk just placed and another disk of the current player's colour are turned over to the current player's colour.

The object of the game is to have the majority of disks turned to display your colour when the last playable empty square is filled.

Programmer's Reference

See the programmer's reference for details about the gamestate and making a valid move for this game