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Code breaking online

Play code breaking right here with Tintlock: no sign-up, nothing to install. Pick a difficulty and get a brand-new puzzle every time.

Difficulty

Code breaking every day

Every day there’s one Tintlock puzzle that everyone plays, with a leaderboard, streaks and an archive of past days.

How to play code breaking

Tintlock is a code-breaking puzzle: you work out a hidden code of colors from the clues each try gives you.

The lock has a secret code of colors. Fill a row and try it: a dot means a right color in the right spot, a ring a right color in the wrong spot. The marks don’t say which color they mean. Crack the code before you run out of tries.

Tips

  • Use your first tries to learn which colors are in the code at all, for example with two pairs of colors.
  • Change one or two things at a time. When the marks change, you know which change did it.
  • Only try codes that fit every clue so far. A guess that can’t be the answer wastes a try.

Want more techniques? Read the strategy guide.

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