alanback: I disagree with your assertion that Backgammon is a perfect information game. There are unknowns in it and that means that it isn't a perfect information game. Chess or Checkers are perfect information games. Dark Chess is usually not. As for whether or not one might be able to bluff in Backgammon, even with the cube in play, I don't see a way for that to be done. You either go for it, or you don't. It is true that your opponent can see the whole game, but he doesn't know what the dice will roll and lacks information on exactly what the coming rolls will be. A player may take an anti-percentage stance, but that's not the same thing as bluffing.