Backgammon according to the normal movement rules. The first player to bear off all fifteen of his/her own checkers wins the game. If the opponent has not yet borne off any checkers when the game ends, the winner scores a "gammon", which counts for double stakes. If the opponent has not yet borne off any checkers and has some on the bar or in the winner's home board, the winner scores a "backgammon", which counts for triple stakes. To speed up match play and to provide an added dimension for strategy, a doubling cube is usually used. The doubling cube is
Backgammon to the real game, actual doubling strategy may vary, but the 80% number still provides a possible rule of thumb. To reduce the possibility of cheating, most good quality backgammon sets use precision dice and a dice cup. This reduces the likelihood of loaded dice being used, which is the main way of cheating in face-to-face play. A common method of cheating online is the use of a computer program to find the optimal move on each turn; to combat this, many online sites use move-comparison software that identifies when a player's moves resemble those of a backgammon program. Online