I read that the robots are programmed to play 2 over 1. I used to occasionally play with the robots, but since I don't know 2 over 1, there's no point in trying to play with them. Have they always played this method or is it fairly recent? I realize they aren't people, but they so often bid a suit and will be void in it or only have a singleton. Do most players in BBO play 2 over 1?