Sudoku - start & play

Choose a difficulty between Easy, Medium and Hard then start the Sudoku puzzle immediately ! Can work offline too.

At the start a Sudoku puzzle is randomly created, then some numbers will be shown.
Fill the grid so that each column, each row and each 3x3 subgrids have all the numbers from 1 to 9.
You can write multiple numbers as a small note inside a square to help you find the possible number option as you progress in the Sudoku.
If there are errors when the grid is filled an helper will detect the wrong numbers. You can also restart the Sudoku or beginning a new puzzle.