coan.net: OK, I just thought that a backgammon would result in 3 points, not 5... at least that's how I understand the rules:

* Single game (1 point) - the winner's opponent has borne off at least one piece.
* Gammon (2 points) - the opponent hasn't borne off any pieces.
* Backgammon (3 points) - the opponent hasn't borne off any pieces and still has some pieces either on the bar or in the winner's home area (the six pipes where the winner bears off own pieces).

Or did I miss some extra modifications or something that affects the amount of points?