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Backgammon Online Backgammon | Backgammon Rules | Backgammon Strategy | Backgammon History Backgammon Doubling | World Backgammon Championship | Free Backgammon
Backgammon DoublingThe Backgammon Doubling CubeIn a backgammon game a doubling cube is typically used. The doubling cube has six sides and is numbered 2,4,8,16, 32, and 64 (instead of the usual numbers 1 through 6). The backgammon doubling cube increases the gambling aspects of the game and adds an extra element to backgammon strategy. The backgammon doubling cube is generally used by a player when he thinks he has the advantage in the game. Either player may, before rolling the dice when it is his turn, demand that the stakes in the backgammon be doubled. The opposing player then has to accept the wager or resign and concede the backgammon game. With the acceptance of the doubling wager, the backgammon doubling cube is positioned with the number 2 showing up indicating that the original stakes in the backgammon game have been doubled. The exclusive right to double again, then passes to the player who accepted the doubling challenge. That player has the right to go through the same steps and issue a doubling challenge to the current stakes. If this were to happen, the backgammon doubling cube would be placed with the 4 showing up indicating that the original stakes have now multiplied by 4. The process goes on with the right to double passing back and forth. As practical matter, continuous redoubles do not happen that often in a backgammon game. Since a player generally does not issue a doubling challenge unless he thinks he has the advantage, one would not expect many redoubles unless it was a real back and forth game with the advantage changing frequently. Theoretically, however, there is no limit to the amount of redoubles in the game. Even though the backgammon doubling cube only goes to 64, redoubling can continue to 128, 256, etc. Automatic Doubles Often in backgammon money games, but seldom in match play, automatic doubles are used. In such games, an automatic double will occur if the very first roll of the game is a tie. So, if each player rolls a 5, the stakes are doubled. If they roll the same number again, the stakes are doubled again. Afterwards, each player still has the right redouble during the game as usual. Beavers and Raccoons Backgammon money games, as opposed to match play, typically allow for beavers. In such games, a player who receives a doubling challenge has the option to respond with an immediate redoubling challenge - a beaver. The beaver redoubling challenge must be made before the player who issued the doubling challenge rolls the dice. The player who issues the redoubling beaver challenge remains in control of the doubling cube and the exclusive right to make the next doubling challenge. Less commonly, money backgammon games may allow a raccoon - an immediate redoubling challenge option by the player who received the beaver challenge. Backgammon doubling can progress very rapidly in games with beavers and raccoons. The Jacoby Rule The Jacoby Rule adds another element of strategy to money backgammon games. In a backgammon game with the Jacoby Rule, gammons and backgammons count for their respective double and triple values only if there has been at least one use of the doubling cube in the game (not including automatic doubles). The Jacoby Rule encourages a player with a large lead in a game to issue a doubling challenge, and possibly end the game, rather than let the game proceed to its completion in hopes of a gammon or backgammon. The Crawford Rule The Crawford rule is generally used in backgammon match play. The objective of the rule is to make match play more equitable for the player in the lead. If a player in a match play backgammon game is one point away from winning a match, his opponent has no incentive not to double - whether the game is worth one point or two, the outcome of the match is unaffected. To balance such situations, the Crawford rule states: if a player attains a match score one game short of victory, the next game of the match is to be played without a doubling cube. This one game in which neither player may double is called the Crawford game. Normal doubling cube rules apply for the games after the Crawford game.
There you have it. Everything you need to know about backgammon doubling and the backgammon doubling cube. For an explanation of basic backgammon rules, see backgammon rules, and for more on basic strategy, see backgammon strategy. To read about playing backgammon online, go to online backgammon.
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