Gammon
When a player bears off all checkers before opponent has borne off any.
Occurs 1:5 games.
Doubles stakes.
Blot Hit
When opponent lands on an exposed checker (a single checker on a point) is hit, causing it to be removed from the board and placed on the bar (25th location).
Backgammon
When a player bears off all checkers before opponent (1) has borne off any and (2) has at least one checker on the bar or in the winner’s home board.
Occurs approximately 1:100
Triples stakes.