Backgammoni kordajad

In order to increase the speed and difficulty of the game, and to make the game more interesting, multiplier blocks are usually used in the game. Multiples cubes are cubes engraved with the numbers 2, 4, 8, 16, 32 and 64. Before rolling the dice, the player can ask to double the score. The other party must immediately accept the request, or admit defeat. If you accept the request, turn the multiplier square to the number 2 up and the points you get will be doubled. That is, two points for a win, four points for a complete win, and two points for a loss. There is no limit to the number of doublings, it can be added to 128 times, 256 times, but in fact it is rarely more than 4 times. Multipliers require players not only to choose the best move, but also to estimate the probability of winning. Under normal circumstances, if you think that your probability of winning is greater than one-half, you should propose a doubling; if the probability of winning is greater than one-quarter, you should accept a doubling (these two probabilities are not only related to the total number of points of both sides and the position of the pieces) , but also related to the player's personal level, style, and angle of view).

There are two more important rules about multiples squares: Jacobi's rule and Clover's rule. The Jacobian rule states that if a multiplier block is not used in the game, a complete win or a complete win will only result in one point. This rule encourages players to use multipliers instead of playing all the way to the end hoping to win or win. The Jacobian rule is widely used in gambling, but not in competitions.

Cloveri reeglid näevad ette, et kui üks pool võidab mängu vaid ühe punktiga, ei tohi kumbki pool kasutada kordajat. Selle reegli eesmärk on takistada ühel poolel esitamast kahekordistamistaotlust, et suurendada võiduvõimalust, kui üks pool võidab mängu vaid ühe punktiga. Ristiku reegleid kasutatakse sageli võistlustel.