Game guide · HRBJFRHG
Read before your next round of Mastermind
Deduce a hidden four-colour code within ten guesses, using exact and misplaced feedback. The game area remains available above the explanation. The computer chooses four positions from six colours; repeated colours are allowed. Try the rule on the board, then read the next instruction.
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
Keep the goal in view while choosing a move. Check guess records your attempt. Exact means correct colour and position; misplaced means correct colour in another position. Try the rule on the board, then read the next instruction.
Your goal
A careful first move helps you understand the round. Deduce a hidden four-colour code within ten guesses, using exact and misplaced feedback. Keep the goal in mind before your next move.
Making your moves
- 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.
How to use the controls
A careful first move helps you understand the round. 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. The game area remains available above the explanation.
A useful example
The example and rules describe the same game you can play above. 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 this in mind
Begin with the basic rule, then follow the result of your action. Four misplaced matches do not mean four exact positions. Also, repeated colours must not be counted more times than they appear in the secret. Try the rule on the board, then read the next instruction.
Answers about the rules and controls
What is the aim of Mastermind?
Deduce a hidden four-colour code within ten guesses, using exact and misplaced feedback. Use the labelled controls for your next action.
During a round, 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. No download or player account is required.
On this page, 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. The worked example offers another way to follow the 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. The controls work with mouse or touch.
For this game, 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. Scores here do not represent cash or prizes.
When I start, 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.
During a round, can the secret repeat a colour?
Yes. Any of the six colours can appear more than once. Use the labelled controls for your next action.
What does misplaced mean?
The guessed colour appears in the secret but not at that position, after exact matches have been accounted for. No download or player account is required.
Are colour numbers part of the rules?
They are labels for accessibility; the number and its colour refer to the same peg choice. Keep the current game state in view while applying this rule.
Can I see the answer?
The answer is shown when you solve the code or use all ten guesses. A new round resets the current game.
