← All games
Sudoku
Objective
- Fill every cell so each row, column, and box contains each number exactly once.
- Standard grids use 1–9; mini grids use 1–4.
Controls
- Tap a cell and enter a number to fill it.
- Switch to candidate mode to pencil in possible numbers.
- Tap a filled cell again to clear it.
Tools
- Check — highlight incorrect cells.
- Reveal — show the solution for a cell or the entire grid.
- Clear — erase all your entries.
Difficulty
- Puzzles range from easy to expert based on the solving techniques required.
Tips
- Look for rows, columns, or boxes with only one empty cell — those can be solved immediately.
- Use candidate mode to narrow down possibilities before committing.