The most complete glossary of backgammon terms
Playing a position out to the end of the game once (or to the point of truncation). A rollout consists of multiple trials, the results of which are averaged together to yield an estimate of the equity of the position.
The roll of 1 and 2 with two dice.
A backgammon variant in which the roll of 1 and 2 gives the player extra turns. See: How to Play Acey-Deucey.