Numbun

How to play

Find a secret 4-digit number made of 4 different digits, never starting with 0, in 10 tries. After each guess, + counts the digits that are correct and in the right place, and - counts the digits that are in the number but in the wrong place, without saying which ones. A second puzzle, the Case, shows 5 guesses already made with their clues, and you get 3 tries to deduce the number from them.