My stand is if you have more than one person using the same computer to play games here, one should have a membership. In the before mentioned case, both Mastermind and Smart Alx are paid members so I dont see any real problems with them playing each other even if it is a rated game. One can tell if the game was rigged or legitimate based on reviewing a game's moves. I know there are exceptions to that statement. For the most though it is verily easy to determine.