Seems rigged

In single player mode, medium and hard levels,the computer will most likely roll fives or sixes, while you will roll low numbers. It will also roll doubles when it is about to be beaten. I have been playing Backgammon for over twenty years and never have I seen a player with even close to the amount of lucky rolls that this "opponent" receives.

Rx 597 about Backgammon - Classic Dice Game, v4.4.0