Code Crack
All gamesGuesses 0 / 7Codes left 5040Ruled out 0
Build a four-digit code with no digit twice. 5040 codes are possible and you have 7 guesses.
Find the hidden four-digit code. No digit is used twice.
5040 codes are possible: ten digits, four places, none repeated. Fill all four slots to ask about one of them.
- ✓ right digit, right place
- △ right digit, wrong place
- ★ in every code that still fits
- ✕ in none of them
- ◆ standing in your guess
5040 of 5040 codes still fit every answer. 0 of 7 guesses used.
← → choose a position · ↑ ↓ change its digit, skipping any digit already standing elsewhere · Enter asks about the code · Backspace clears the position, which is free. Click the board first, or press Tab to focus it.