Sudoku
Classic Sudoku in your browser. No ads mid-game, no login, progress saved locally.
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How to use
- Pick a difficulty.
- Tap a cell to select it, then tap a number (or press 1–9).
- Your progress is saved in this browser automatically.
Examples
Difficulties
Easy (~36 clues), Medium (~30), Hard (~26), Expert (~22).
Frequently asked questions
› Can I take notes?
Pencil marks are planned for a future version.
› How is the board generated?
Standard backtracking solver with uniqueness-guaranteed generator.