How to Play
Three minutes to learn. A lifetime of bragging rights. Master the mental battlefield of binary deduction and cipher breaking.
The Secret Number
Each duelist locks in an undisclosed 4-digit code. Every code must adhere to strict mathematical validity constraints:
The Guess Protocol
Every round, transmit 4 non-repeating digits. You receive instantaneous positional telemetry.
Repeat guesses are prohibited by UI. Every probe burns one turn token.
The Deduction Matrix
Clues are calculated in real-time after every submitted attempt. Memorize these three tactical signatures:
Correct digit locked in the exact right position.
Digit exists inside the vault, but is currently in the wrong slot.
Digit is totally absent from the secret number. Completely eliminated.
A Turn, Dissected
Right digit & right slot. Target anchored.
1 exists in vault (Slot 3), but transmitted into Slot 2.
5 is completely unassigned in 3719. Discard it.
Identical position and value lock. Second Pico.
If your initial guess yields 1 Pico and 2 Palas, you already possess 3 out of 4 correct vault numbers (75% precision). Never randomize on Turn 2. Keep 3 numbers, permute positions, and swap only the single suspect candidate.
If neither duelist decrypts all 4 digits within 12 attempts, the duel terminates in a Tactical Draw. Both secret vaults are unveiled simultaneously for mutual review.
GAME MODES
Choose your battlefield and test your mental agility.
Private Room
Host a private battle room or join with a match key.
Global Arena
Challenge duelists worldwide with ELO rating at stake.
Ready to test your deduction?
Sign in and face the AI in a duel whenever you want.