Mastermind or Master Mind is a code breaking game for two players. The modern stake game was invented in 1970 by Mordecai Meirowitz, an Israeli postmaster and telecommunications expert. It looks like an old set of pencils and paper called Bulls and Cows that can go back a century or more.
The iPhone chooses a model of four pegs of code. Duplicates are allowed, so the iPhone could even choose four code pegs of the same color.
The player tries to guess the pattern, in order and color, within ten turns. Each assumption is made by placing a row of code pins on the decoding card. Once placed, the iPhone provides feedback by placing zero to four key holders in the small holes in the …
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