what is it
A game of pure deduction, played on a 3×3 grid of seven-segment digits. Somewhere in those nine digits sits a secret code. Ask sharp questions, rule out the impossible, and declare it before your rival does.
Adapted from the tabletop game Digit Code and rebuilt for the browser — then stretched from the original 3×2 board to a tougher 3×3.
how you play
On your turn you ask one question about the hidden code:
- how many cells are lit in any row or column
- whether a chosen digit is even or odd
- which of two neighbours is larger
- whether a single segment is lit or dark
- or declare the whole code — but guess wrong twice and you're out
the hidden code
The code is nine digits laid out on the 3×3 grid. It always obeys three rules — worth knowing, because every deduction leans on them:
- each digit is 0 to 9
- no digit appears more than twice in the whole grid
- identical digits never touch — not side by side, not stacked (the original tabletop game used a 3×2 grid with the same idea)
two ways to play
Duel. Two players. Each sets a secret code, then you interrogate each other — first to crack it wins.
Race. One to eight players. The machine hides a single code and everyone shares the answers, taking turns in order. Solo works too — just you against the grid.
Play in one sitting or a move a day — rooms hold their place for weeks. No account. Share a four-letter code and go.
features
- duel + race modes
- 1 to 8 players
- real-time or day-by-day
- invite by room code
- interactive deduction sheet
- pencil marks + strike-offs
- answers auto-fill
- turn-by-turn game log
- abandon any time
- no account needed
credits
Based on the original board game Digit Code (2025) — designed by Shota Hasuike, art by Wanjin Gill, published by Playte and Nice Game Publishing.
DigitCode 3×3 is an unofficial fan-made adaptation. All credit for the original game and its design belongs to its creators and publishers.