How to play Sudoku
- Fill the 9×9 grid so every row, column and 3×3 box has digits 1–9.
- Tap a cell, then a number. Long-press or toggle notes for pencil marks.
- Solve with fewer mistakes for a higher score.
Sudoku is free to play online at Trivio — no download, no signup, works on desktop and mobile. Your best score is saved in your browser.