🧩 Mastermind Code Breaker

<p>Crack a hidden four-colour code in ten guesses, reading the black-and-white clues like a true detective. Mastermind Code Breaker is a code-breaking deduction game: crack the hidden colour combination using clues after every guess. Under the surface it's quietly training logical deduction, elimination and inference. It rewards small, regular sessions, so it slots neatly into a coffee break, a commute or a bedtime wind-down. Smooth on slow connections and gorgeous on big screens, it's made to be enjoyed by a worldwide audience. It runs instantly in your browser on phone, tablet or desktop with no download, no install and no sign-up. It sits comfortably alongside the other thinky games in our collection if you fancy a change of pace. Your best result is saved locally, so each visit you're really racing the toughest opponent of all — yourself. Beat a personal record and the built-in share buttons let you challenge a friend on WhatsApp or Telegram in one tap. There are no timers forcing you to rush unless the game itself adds one, so you can play at your own thoughtful pace.</p>

How to play

• Build a four-colour guess from the palette.
• Press Check to score it.
• A black peg means a colour is right and in the right place.
• A white peg means a right colour in the wrong place.
• Use each clue to deduce the secret code within ten tries.

Controls

Tap colours to build a four-peg guess, then press Check. Black markers mean right colour and spot; white means right colour, wrong spot.

Features

• Classic Mastermind deduction
• Clear black/white peg feedback
• Fewest-guesses scoring
• Six colours for deep logic

FAQ