2.8 Optional Rules
The following optional rules are in widespread use.
- Automatic doubles. If identical numbers are thrown on the first
roll, the stakes are doubled. The double cube is turned to 2 and
remains in the middle. Players usually agree to limit the number of
automatic doubles to one per game.
- Beavers. When a player is doubled, he may immediately redouble
(beaver) while retaining possession of the cube. The original
doubler has the option of accepting or refusing as with a normal
- The Jacoby Rule. Gammons and backgammons count only as a single
game if neither player has offered a double during the course of the
game. This rule speeds up play by eliminating situations where a
player avoids doubling so he can play on for a gammon.