Goal

Crack the hidden code. Fill the row with symbols and tap Check. Each guess gets pegs: a gold dot for each symbol that's right and in the right place, a teal ring for each one that's in the code but somewhere else. The pegs never say which — that's for you to work out.

Levels

• Each level has a par — a good number of guesses. 2 codes cracked within par move you up; 2 misses in a row (over par, or out of guesses) move you down.
• Codes grow from 3 places with 4 symbols to 5 places with 7. At levels 5 and 8 a symbol can appear more than once.
• Tap a filled place to clear it.

Scoring

A cracked code earns 6 + 3 × the level, plus 4 for each guess under par (and 4 at par).

Deductive Reasoning

After Mastermind: every clue rules some codes out. Choosing the guess that tells you the most — and keeping all the clues in mind — is logical reasoning at its purest.