From what I understand of the game (owning it but never having opened it) I think this applies. The faces of the dice represent the different chess pieces, which can change during play. The dice are then moved about the board based on the movement characteristics of the current face-up piece displayed on that particular die.
Each player owns 4 dices on a board. One player starts with number 1 on top the other with number 6. On each turn a player moves a dice the number that is shown on top. Your goal is to beat the dices of your opponent.
The Doubling Cube 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.
Played on a grid of 15 x 15 squares with 6-sided dice with "normal" numbers.
Each players have 15 of these, placed in the 3rd and 4th row for the start in a fixed position and orientation. Players move one of their dice each turn, as many fields as the number on the top of it, in every direction and the possibility of changing the direction once orthogonally. While moving, the die is tilted with each step on the next side. If a die is placed adjacent to one or more dice of the opponent, it captures them, if its number is higher than the sum of the opponent`s, or the other way round.
To win the game, you have to capture all your opponents` dice.