Many casual backgammon players have never used a doubling cube, but it brings a significant amount of new strategy into the game and is credited with the longevity of the game by knowledgeable players.
Double. Double. An offer made by one player to his opponent during the course of the game (on that player's turn, but before he has rolled the dice) to continue the game at twice the current stakes. The opponent may refuse the double, in which case he resigns the game and loses the current (undoubled) stakes.
The first player to bear off all fifteen checkers wins the game. Doubling. Backgammon is played for an agreed stake per point. Each game starts at one point. During the course of the game, a player who feels he has a sufficient advantage may propose doubling the stakes.
Classic game of Backgammon – comprehensive instructions for friendly play from. The doubling cube is a die having the numbers 2, 4, 8, 16, 32 and 64 .