The New York Times website has a digital version of Rock-Paper-Scissors that allows you to play the classic game against the computer. The program attempts to beat you by predicting your next move by statistically analyzing some 200,000 past games the robot played against humans. You can choose to play against a novice computer, that has no past data to analyze and learns as you play, or try your luck against the veteran program. The robot is no Watson, but still fun to play against.
The brilliant part of the game is that it actually allows you to see what the computer is thinking. It’s intriguing to watch how the program “thinks”. Do not use it to cheat though – there is no fun in cheating.