Checkers was a two-player strategy board game from Earth. The game was played with twelve, usually round, pieces per player, placed on a checkerboard. The object of the game was for each player to move their pieces diagonally across the board by jumping, or capturing, the opponent's pieces. The first person to capture all of the opponent's pieces won.
A three-dimensional board game played with checkers pieces on chess-like boards was among those available for play aboard the USS Enterprise. (TOS: "The Naked Time")