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Sudoku
Number puzzle · freeAbout Sudoku
Sudoku is the world’s favourite number puzzle. Fill the grid so that every row, every column and every 3×3 box contains the numbers 1 to 9 exactly once. Every game creates a fresh puzzle.
How to play
- Pick an empty square.
- Tap a number from 1 to 9 (or type it).
- Each row, column and 3×3 box must use 1–9 once.
- Numbers that clash turn red. Fill the whole grid to finish.
Controls
| Choose a square | Click or tap, or move with the arrow keys |
| Enter a number | Number buttons or keys 1–9 |
| Erase | ⌫ button, Backspace or 0 |
Tips
- Look for rows or boxes that already have many numbers.
- Tapping a square highlights the same number everywhere on the board.
Questions
Is every Sudoku new?
Yes. A fresh puzzle is generated each time you press New puzzle.
What do red numbers mean?
A red number clashes with the same number in its row, column or box.