Mastermind There is a hidden 5-digit string, where its characters are among 1-9 only, but the characters may repeat. The objective is to discover this string. There are several guesses that has been made about the string. Each guess is a string of the same length and from the same character set, and its response is a number of black circles and/or white circles (might be none). A black circle indicates a character that exists in the hidden string and is on the correct position, while a white circle indicates a character that exists in the hidden string but is not on the correct position. For example, if the hidden string is 11223 and the guess is 13123, three black circles for the first 1, the 2, and the last 3, and a white circle for the other 1 will be awarded.
Difficulty 1.5/10 Master time 0:20 Expert time 0:50
Whee. This thing is easy to make in head. This puzzle, not this genre. I’m sure it’s possible to make a difficult puzzle in this genre.
Also, note that Puzzle 57 has reached the fifth version, which I hope to be unique.
Finally, stay tuned. I’ll post one or two more puzzles soon.