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Mastermind Online: Crack the Code with Friends

Mastermind is the code-breaking game Mastermind you can play free in your browser. Crack the secret colour code in as few guesses as you can. Play alone, or race your friends on the same code.

Play Mastermind now Plan a whole game night

How to play Mastermind

  1. Make a room. Type your name, tap Create a room and send the five-character code (or the link) to your friends. Phones and laptops can share a room.
  2. There is a secret code of coloured pegs. Make a guess; you are told how many pegs are the right colour in the right place (✓) and how many are the right colour in the wrong place (↔).
  3. Use that to narrow it down. You have ten guesses. Your guesses are yours alone; others only see how many you have used.
  4. The fewest guesses cracks it best (speed breaks a tie): 10 points, then 7, 5, 4, 3, 2, 1.

Settings

The host can change these in the room before starting. The default is marked.

Codes1 to 82 (default)
Seconds per code60 to 600 seconds240 seconds (default)
Code length4 pegs (default)5 pegs
Colours6 colours (default)8 colours
Repeat coloursNo (default)Yes

Is it a good fit for your group?

Best when you want something thinking, strategy, competitive. Every game on the site has a Game DNA score from 1 to 5:

Skill5/5
Luck1/5
Social1/5
Brain power5/5
Chaos1/5
Replay value4/5

Playing with a bigger group or short on time? Start a game night instead: pick Quick, Standard, Chaos, Tournament or Endless and the mood you are in, and the site lines up games that fit your group, with one room table across all of them.

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