Today's pick
Sudoku
Fill the 9×9 grid with numbers 1-9
- ~10 min
- Classic puzzle
- Logic
- Easy / Medium / Hard
No account needed to play. Save your streak
Play today's puzzle
How to play Sudoku
- 1Fill each row with numbers 1-9
- 2Fill each column with numbers 1-9
- 3Fill each 3×3 box with numbers 1-9
Tips and strategy for Sudoku
- Look for a digit whose possible squares inside one box have shrunk to a single cell.
- Use notes mode to list candidates, then clear them as soon as a placement rules them out.
- When two cells in a box share the same pair of candidates, no other cell there can take them.
Questions about Sudoku
How do I know a Sudoku grid is finished?
Every row, column and 3×3 box holds the digits 1 to 9 once, and a complete grid with no conflicts closes the puzzle.
Does Sudoku offer difficulty settings?
Yes. Easy, medium and hard change how many cells start filled in, so harder boards leave more of the work to you.