About Rush Sudoku
This is the game we wrote first, and it is still the one we play most. A standard nine-by-nine grid, a daily board that everyone gets the same version of, and a practice button that deals a fresh puzzle whenever the daily one is finished.
Two things make it worth using over the dozens of other sudoku sites. Every board is generated from a verified single-solution seed and checked programmatically before it reaches you, so there is never an ambiguous grid where two digits both work. And the interface stays out of the way — no timers counting down, no lives, no prompts to buy hints.
How to play
Fill the grid so that each row, each column, and each three-by-three box contains the digits one to nine exactly once. Given digits are locked. The panel tracks how many of your entered digits disagree with the solution, so you can tell whether you have gone wrong without being told where.
Controls
- Click or tap a square to select it, then press a number key or use the on-screen pad.
- Toggle Notes to pencil in candidates instead of committing a digit.
- Clear empties the selected square.
- New practice generates a fresh board.
Tips
- Scan for the digit that already appears most often on the board; it usually has the fewest legal homes left.
- Notes earn their keep on boxes with three or more empty squares. Below that, the answer is normally faster to see directly.
- If the mismatch count rises after a confident entry, the mistake is often not the digit you just placed but one you placed several moves earlier in the same box.
- A square where only one candidate survives is worth more than a digit that only fits one square — but check for both, since the second kind is easier to miss.
