SMIRF Engine: I don't know about the current version of SMIRF, but I remember it starting the games differently when playing it in Janus Chess. And defending differently too. That doesn't prove anything though. What move it selects could be very dependent on how long it searches to make the move, even the very first move of the game. This being so, it could make a different move if he sets it to think 1 hour before moving as compared to one minute or one day. And then there's upgrades. And what happens when the machine view two or more moves as equally best moves for it. It has to pick one of them. Perhaps it has a random factor if its not memorizing its played games. Remember that to his program the start of the game is the same as 20 moves later, it just wings every move.