'Bulls and cows' is an interesting & entertaining code breaking or number finding game. This is one of the alternate versions of the Mastermind game. This is usually played between two players. This free online version is designed to be played by a single player. In this game you should find the secret number chosen by the computer, in as few guesses as possible.

How to Play: Bulls and Cows

• The text area shows the no. of bulls and cows that matches your guess.
• If your try has matching digits on the exact places, they are Bulls.
• If you have digits from the secret number, but not on the right places, they are Cows.
• All digits in the secret number are different and cannot start with zero.
• Code breaking Game is usually played with 4 digits, but can also be played with 3 to 9 digit numbers.

Secret number: 4231
Opponent's try: 6134
Answer: 1 bull and 2 cows. (The bull is "3", the cows are "4" and "1".)

Mastermind (code breaking game) is very popular among children in Bulgaria and across the world.