Sudoku
Fill the 9×9 grid so that every row, column, and 3×3 box contains the digits 1 to 9 once. Choose a level and a new puzzle is made for you.
Records are kept in this browser. Sign in to sync them to your account.
How to play sudoku
- Choose Easy, Medium, or Hard. A new puzzle starts and the timer begins.
- Select an empty cell, then tap a digit or type it on your keyboard. Arrow keys move between cells.
- Turn on Notes to pencil in candidates. Digits that break a rule turn red; fill every cell correctly to finish.
Each puzzle is generated in your browser and checked to have a single solution, so you never need to guess between two valid answers.
Easy puzzles keep 40 digits, Medium 32, and Hard about 26. Your fastest time for each level is saved on this device.
Starting a new game or changing the level discards the current puzzle, and its time is not recorded.