Match That!
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Match That!
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The object of this game is to find out the colours of the four counters chosen by the computer, in the least number of guesses. The colours have to be in the right order too.

Input your guess by typing in the initial letters of the colours, for example, RBBY for red, blue, blue and yellow. The computer then responds by giving you a few cryptic clues telling you how many colours are correct and how many are in the right position — although it doesn't tell you which colours are the right ones! The code it uses is a white dot for a correct colour in the wrong place and a black dot for a correct colour that's also in the right position. Use these clues to decide on your next guess. You have 12 goes to find the correct code.

The colours used are yellow, white, blue, red, cyan and magenta.

Originally published in Input #43, page 1356