Sudoku
Play free Sudoku online with three difficulty levels, pencil notes, hints, and local personal records. Use your keyboard or touch controls. No sign-up.
Interactive play requires JavaScript. You can read the rules below.
How to play Sudoku
- Fill each row, column, and 3 × 3 box with the digits 1–9, without repeating a digit.
- Select an empty cell and enter a digit. Use notes to keep track of candidates.
- Choose a difficulty, check your work, or ask for a hint when you need one.