Bulls and Cows

Discover the hidden code! Click to change your guess in each box.
(Note: Bulls and Cows is similar to, but came before, the board game MastermindTM*)
Bulls = correct code, correct position.
Cows = correct code, wrong position.
Try different codes and use your brain to figure it out, before all your moves are up!

(* Note: MastermindTM is a trademark of Pressman Toy Corporation, in no way associated with this website.)