🧩 Puzzle & board games · free, no sign-up
Loading Codebreaker…
Learn beyond the game
Suppose the secret is red, blue, green, yellow and your guess is red, green, yellow, coral. The feedback is one exact match, two colours in other slots, and one colour that is absent. The clue gives counts, so you still have to work out which colours moved.
A light clue does not belong to the peg directly beside it. It only says that a guessed colour appears somewhere else in the code. Treat the feedback as totals, not as a map of the secret.
Pick four coloured pencils, hide their order, and let a partner make guesses on paper. Record exact and misplaced colours with tally marks, then switch roles and compare strategies.
A three-slot code uses red, blue and green exactly once. Your guess is red, green, blue and the clue says one exact match. How many possible codes remain?
Three codes remain: choose which one of the three positions is exact, then swap the other two colours.
Start with Starter mode to practise reading clues without repeated colours. Move to Classic when you can keep track of colours that are ruled out, then try Expert or the shared daily puzzle.
Mini Sudoku uses the same habit of narrowing possibilities from several constraints. Try Mini Sudoku, then move on to Knights and Knaves for longer chains of deduction.
Keep playing
FAQ
A dark clue means a colour is in the correct position. A light clue means a colour appears in the code, but in a different position. The clues do not identify which peg matches.
It starts with a short code and adjusts the number of positions and colours using your recent solves. Fast solves raise the challenge; missed codes ease it.
Yes. The daily challenge uses the same secret code for every player on that UTC date.
Start a conversation
A parent or guardian can share the learner's age, level and goals, and we'll suggest a starting point and confirm the format before anything is booked.
