Two small cubes used in backgammon games.
Each of the six sides of a cube is marked with 1-6 dots.
Each player in his turn rolls two cubes and moves his checkers according to
the numbers on the cubes. For example, if the cubes show the numbers 2 and 5,
the player can moves one checker 2 places ahead and another checker 5 places
ahead. He also can move only one checker the total of 7 places ahead on the
board.
