What DIGIGMA is
DIGIGMA is a site for number puzzles. You open a board in the browser you already have. You sit with it. You leave when you want to leave. There is nothing to install, and there will not be a campaign asking you to pin us to your home screen.
Every live puzzle has exactly one solution. You reach it by reading the constraints — not by racing, not by guessing, and not by watching an advertisement between cells.
Six number games
The catalogue is small on purpose. Six games, four difficulties:
- Sudoku — the classic 9×9. Place 1 through 9 in every row, column, and box.
- Killer Sudoku — the same 9×9, with cages that must add up to a printed total. Digits do not repeat inside a cage.
- Binary Puzzle — 6×6 or 8×8, filled with 0s and 1s. Equal counts, no three identical in a line, every row and column unique.
- Futoshiki — place 1–N once in every row and column, while respecting the inequalities.
- Kakuro — fill each run with distinct digits 1–9 so they add up to its clue.
- Codebreaker — crack the hidden code using exact and misplaced digit clues.
A new puzzle is published every four hours. Everyone can play it. If you want the rules, the How to play guides are the place. Published puzzles of a game live on that game’s page under Games.
One solution, found by reason
A DIGIGMA board is not a riddle with a cute trick at the end, and it is not a maze of equally legal finishes. There is one completed grid that obeys the rules. That fact is what makes a careful scan feel like work instead of luck. When two candidates still look possible, you have not finished reading yet.
We wrote more about that contract in A unique solution and Why guessing feels worse.
In the browser, nothing to install
Play happens in this tab. There is no app store, no extra runtime, and no prompt to pin the site to a home screen. That is a decision, not a missing feature. The board should be as easy to open as a page of text, and as easy to close.
You can play at a desk or on a phone. The rules do not change. Play in your browser is the longer note on that.
An account if you want one
You can open a grid without signing in. A guest sit is a real sit. If you create an account, you choose a public username — not your email — and DIGIGMA can keep your history, your streak, and your progress when you change machines. One account is one person. Usernames are unique, ignoring letter case, so the name you see on a board is a name nobody else holds.
An account is not a wall in front of the puzzles. It is a way to keep an identity if you want one to persist.
A day, if you want a day
The catalogue is six number games. A new published puzzle appears every four hours. You can play it, or skip it. A streak counts days you showed up. It is a mark, not a debt. Missing a rotation does not make the next board harder, and it does not make yesterday cheaper.
Time, without a contest
A clock can run while you play. It is there for you — a sense of the sit, a best time in your history. DIGIGMA is not a product that assumes you came to compete. Official first finishes appear on that puzzle’s leaderboard. Replays never do. Time without a contest explains the distinction without turning it into a rulebook.
No ads, now or later
DIGIGMA does not show advertisements. It will not. The board is not a surface we rent to someone else. If you want the site to stay independent, Support us is the page for that — including Founding Member, a single €4.99 payment for the first 100 people, for life. It is optional. The puzzles do not get worse if you skip it.
A quiet place to sit
That is the whole product, said plainly: six number games, a new published puzzle every four hours, unique solutions, a permanent leaderboard on each puzzle, a browser tab, an optional name, and no advertising in between. Premium is optional and adds assist tools, replay, and stats. Using an assist on the official first run leaves the leaderboard. If a game is new, read its how-to, then open a published puzzle from Games.