A duel over a hidden number
Crack their number before they crack yours.
You each hide four or five digits. Then you take turns guessing the other’s: every guess is answered, your clock runs only on your move, and the first to break the secret wins.
Practice needs no account and has no clock.
4 digits · All different · Per position · 3 min
Cracked in 5 guesses
How a match goes
- 1
Hide a number
Choose four or five digits for your opponent to break, while they choose one for you. A leading zero is fine, and nothing is refused for looking too easy.
- 2
Read the answers
Every guess is marked: exact is the right digit in the right place, present is in the number but elsewhere, absent is not in it at all. You see the mark on each digit, or in the harder format only how many of each.
- 3
Break it first
Turns alternate and only the clock of the player on the move runs. Find the secret first and you win; let your clock reach zero and you lose.
For when it gets easy
Take the positions away.
In Totals only, a guess comes back as two numbers: how many digits are exact and how many are elsewhere. It is the same marking, without saying which digits, so what you have worked out stays in your head and not on the board.
The same guess at 7145, answered both ways:
Everything a duel needs
A clock, not a guess limit
Six clocks, from 30-second bullet to 30-minute rapid. Guess as often as you like: time is the only budget, and yours runs only on your move.
Pick the difficulty
Four digits or five, repeats allowed or all different, answers per position or as totals. The format is on every lobby row before you take it.
A rating for each way to play
A rated game moves an Elo rating kept apart for its speed and format, so your bullet rating says nothing about your rapid one. Your profile draws every point as a line.
Play your friends
Send an invite link for a private match, see which friends are online, and keep a head-to-head score.
Nobody can peek
Both secrets stay on the server. It marks every guess and decides every result, and your browser sees your opponent’s number only once the match is over.
Warm up solo
Break a random secret on your own, in either format, with no clock and no account.
Your opponent is choosing a number.
Choose yours, and find theirs first.