Free brain-training game
About Code Breaker
Discover a secret code using exact-position and misplaced-digit feedback. Repeated digits are allowed. Twelve puzzles per session, three hearts and no timer.
How to play Code Breaker
- 1Discover a secret code using exact-position and misplaced-digit feedback. Repeated digits are allowed.
- 2Read the rules before your first move, then use the on-screen controls to test your plan.
- 3Complete puzzles to earn stars. You can finish and save your session whenever you want.
What Code Breaker trains
Practise deliberate reasoning, keeping clues in mind and checking a plan before you commit.
Learn about Working Memory Games for Adults: Recall and Updating Tasks →Tips & strategy
- Use all the clues, and check the whole board before submitting.
- There is no speed bonus, so take the time you need.
Frequently asked questions
Is there a timer?
No. These puzzles reward deliberate reasoning. Sessions end after twelve puzzles or three mistakes.
How do stars work?
Solve 1, 3, 5, 8 or 12 puzzles in one session to earn up to five stars. Your best progress is kept.