Mastermind is a game played with pins. There's a code of colours that you have to figure out. Colours can be duplicated if that's turned on. You have ten attempts (put guesses in left column, results in right column). After each attempt you are told if you have the correct colour in the right place (red) or if you have a correct colour but in the wrong place (white), or if you don't have the correct colour (blank). GLHF.
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