One of the rules of Backgammon is that if you can take a move you MUST take it. This game has a bug in it. The game allows you to move only one of the dice rolled, and then pass, even though it is possible to use both dice. My opponent got a 6-1, took the 1 and passed on the six, even though it was possible to move both the 1 and the 6. He then did the same thing with a 6-5, both times to avoid leaving a blot. This is illegal by Backgammon rules. The game should not allow it. I want my money back.