Game guide · GDAIZHIBO
Find your footing in Mastermind
Take a moment to check the current turn. Deduce a hidden four-colour code within ten guesses, using exact and misplaced feedback. The computer chooses four positions from six colours; repeated colours are allowed. Keep the goal in mind before your next move.
Four positions, six colours and ten guesses, with repeated colours allowed. This is an independently coded free colour-code puzzle, not an official branded edition.
A focus for your next round
The example and rules describe the same game you can play above. Check guess records your attempt. Exact means correct colour and position; misplaced means correct colour in another position. Keep the goal in mind before your next move.
Your objective
Keep the goal in view while choosing a move. Deduce a hidden four-colour code within ten guesses, using exact and misplaced feedback. Try the rule on the board, then read the next instruction.
The steps to play
- The computer chooses four positions from six colours; repeated colours are allowed.
- Select a code position and then choose a colour. Fill all four positions.
- Check guess records your attempt. Exact means correct colour and position; misplaced means correct colour in another position.
- Each secret peg can match only one guess peg. Use the feedback to narrow the next guess.
- Find all four exact positions to win. After ten unsuccessful guesses the secret code is revealed.
Keyboard and screen controls
Take a moment to check the current turn. Tap one of four positions, then a labelled colour button. Numbers identify colours as well as the swatches. Press Check guess only when all slots are filled. Keep the goal in mind before your next move.
Work through an example
Keep the goal in view while choosing a move. For secret 1,1,2,2 and guess 1,2,1,3, feedback is one exact and two misplaced. The extra 3 has no match. Try the rule on the board, then read the next instruction.
Notice this detail
Use the controls beside the game rather than guessing the rules. Four misplaced matches do not mean four exact positions. Also, repeated colours must not be counted more times than they appear in the secret. Keep the goal in mind before your next move.
Game-specific help
When I start, what is the aim of Mastermind?
Deduce a hidden four-colour code within ten guesses, using exact and misplaced feedback. Scores here do not represent cash or prizes.
How do the controls work?
Tap one of four positions, then a labelled colour button. Numbers identify colours as well as the swatches. Press Check guess only when all slots are filled. You can start a new round from the game controls.
When I start, can you show an example?
For secret 1,1,2,2 and guess 1,2,1,3, feedback is one exact and two misplaced. The extra 3 has no match. Keep the current game state in view while applying this rule.
During a round, which mistake should I avoid?
Four misplaced matches do not mean four exact positions. Also, repeated colours must not be counted more times than they appear in the secret. You can start a new round from the game controls.
During a round, what rules and limits are used here?
Four positions, six colours and ten guesses, with repeated colours allowed. This is an independently coded free colour-code puzzle, not an official branded edition. A new round resets the current game.
How many people can play here?
Solo. This is local browser play, not internet matchmaking. The worked example offers another way to follow the rule.
Can the secret repeat a colour?
Yes. Any of the six colours can appear more than once. You can start a new round from the game controls.
What does misplaced mean?
The guessed colour appears in the secret but not at that position, after exact matches have been accounted for. The controls work with mouse or touch.
During a round, are colour numbers part of the rules?
They are labels for accessibility; the number and its colour refer to the same peg choice. The controls work with mouse or touch.
Can I see the answer?
The answer is shown when you solve the code or use all ten guesses. No download or player account is required.