You probably know MasterMind. This ain't it. The computer selects a string of zeros and ones and you have to guess it (the default length of the string is six but you can change it). Enter your guess in the "guess" entry box and press the "guess" button or the return key. The computer will tell you how many of your guesses were the right bit in the right place or the right bit in the wrong place. If you guess right the answer will appear on the top. Press "reset" or the space bar to play again. The computer will also keep track of the average number of moves you've taken to find the answer.