Doubling Cube - Backgammon Dictionary

Doubling Cube

1. A cubical block, slightly larger than a regular die, with the numbers 2, 4, 8, 16, 32, and 64 marked on its faces. It is used for keeping track of the increase in stakes of the game and the player who next has the right to double. The cube starts in the middle with the number 64 facing up (representing a value of 1). When you offer a double, you turn the cube to its next higher value and pass it to your opponent. If he accepts your double, he places the cube on his side of the board and becomes the owner of the cube. After the first double of a game, only the player who last accepted a double may make the next double. Rules that affect use of the doubling cube:  automatic doubles, the Jacoby rule, and beavers.