If a player wins the game before his opponent has bared off a single one of his checkers that is known as a gammon and the victorious player wins double whatever the stakes they were playing for. If a player wins and the losing player still has a checker on the bar or in the winner’s home board that is known as a backgammon and the victorious player wins triple whatever the stakes they were playing for
At the end of the game, if the losing player has borne off at least one checker, he loses only the value showing on the doubling cube (one point, if there have been no doubles). However, if the loser has not borne off any of his checkers, he is gammoned and loses twice the value of the doubling cube. Or, worse, if the loser has not borne off any of his checkers and still has a checker on the bar or in the winner's home board, he is backgammoned and loses three times the value of the doubling cube.
