GlenDoku
Sudoku · logic puzzle. A free online sudoku game with multiple difficulty levels, for desktop and mobile.
How to play
Fill a 9×9 grid with digits 1–9 so that every row, column and 3×3 box contains no repeats. Multiple difficulties from beginner to expert.
Features
- Auto-check, notes mode, timer and save;
- Responsive layout for mobile and desktop;
- No download, instant play.