CodeBreaker
logic · deduction · year 6

CodeBreaker — Logic Deduction Game

Find the hidden 4-digit code. Each guess earns Bulls (right digit, right place) and Cows (right digit, wrong place). Deduce — don't guess.

How to play CodeBreaker

Find the hidden 4-digit code from Bulls and Cows feedback — deduce, don't guess.

The rules

  1. A secret 4-digit code is hidden.
  2. Enter a guess. A Bull is a right digit in the right place; a Cow is a right digit in the wrong place.
  3. Use the feedback from every guess to narrow down the code, and crack it in as few guesses as possible.
  4. Classic, Puzzle and Strategy modes, with a deduction tracker and hints (Nudge, Strategy, Guidance).

Playing here

  1. Choose Classic, Puzzle or Strategy mode.
  2. Enter a 4-digit guess with the keypad and press Submit Guess.
  3. Read the Bulls and Cows, and use the deduction tracker to rule digits in or out.
  4. Nudge, Strategy and Guidance give increasing help if you need it.

Tips

The full guide, with a worked example and common mistakes: How to play CodeBreaker.

Questions

What is the difference between a Bull and a Cow?

A Bull is a correct digit in the correct position; a Cow is a correct digit in the wrong position.

Who is it for?

It is designed around Year 6 logic and deduction, but works for any age.

Can I share a result?

Yes — the Share button copies your result after you crack a code.

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