Opponent thinks up a five-color sequence:
R Y B W B
You make guesses, and the opponent tells you
1) How many colors are correct
2) How many colors are in right position
R R R B B 3 correct, 2 in position
R Y Y B B 4 correct, 3 in position
R Y B B B 4 correct, 4 in position
R Y B W B SOLVED!!!