Numberley for PC

The challenger (human or system) is thinking of a four-digit number.

Each digit must be different.

The first digit cannot be zero, other digits may.

Example: 5 0 8 1

Your goal is to identify the conceived number with as few attempts as possible.

Guessing - You tell the challenger a four-digit number, which you believe is conceived number, and the challenger returns you two digits as an answer.

1 defines how many digits match the conceived number digits.

2 defines how many of them are in their correct positions.

If the conceived number is 5 0 8 1 and you say 1 2 3 4, the challenger returns 1 - 0, which means only 1 digit from 1234 matches the conceived number (1), and this digit is not in its position.

In the case of 5 9 8 0, the answer would be 3 - 2, which means 3 digits match the conceived number (5, 8, and 0) and 2 of them are in their correct positions (5 and 8).

You win the Game, when you identify the conceived number, i.e., you get 4 - 4 as an answer.