The Lockbox

The clue ledger

    Long-press a digit (or right-click it) to mark it out, again to mark it in.

    Today's daily Three digits
    Guesses0 / 8

    Notepad Tap a square: ✗ not here, again ● here.

    Reading the lock

    ● a digit correct and well placed, ○ one correct but wrongly placed. Never which ones.

    How to open the lock

    Today's combination is 3 different digits, from 0 to 9. You have 8 guesses.

    1. Type a combination of different digits and press Try.
    2. Read the clue. The lock says how many digits are correct and well placed (●), and how many are correct but wrongly placed (○). Never which ones: that's the puzzle.
    3. Guess again. Each guess adds a clue line. Reason across all of them until you open the lock.

    Watch a game

      Every clue the lock can give