How to play
Fill every row, column, and 3x3 box with the numbers 1 through 9. Given cells cannot be changed.
Playable Brain Games
Sudoku
Play a clean browser Sudoku puzzle with difficulty levels, notes, hints, undo, saved progress, and local stats. Everything runs in your browser.
Playable now Local save No account needed
Saved puzzle restored from this browser.
Easy 00:00
Use notes
Toggle notes when you want to pencil in candidates. Number buttons add or remove notes instead of placing a value.
Static and private
Puzzles, progress, and stats stay in localStorage on this device. Calcly does not need an account to save your game.
More brain games
Other games in this category.
How this game works
Sudoku
A clean number-placement puzzle with difficulty levels, notes, hints, saved progress, and local stats.
How to use it
- 1 Choose the available mode, difficulty, or round controls on the page.
- 2 Play in the browser and use the built-in restart or reset controls when needed.
- 3 Review the result panel, local stats, or progress notes after a round.
Useful for
- Brain Games tasks involving logic
- Brain Games tasks involving numbers
- Brain Games tasks involving daily puzzle