Reversi (also called Othello) is a very popular strategy board game for two players, played on an 8×8 uncheckered board. Players take turns placing disks on the board. During a play, any disks of the opponent's color that are in a straight line and bounded by the disk just placed and another disk of the current player's color are turned over to the current player's color.
The object of the Reversi game is to have the majority of disks turned to display your color when the last playable empty square is filled.