1sudoku.net - Sudoku free website
This site allows you to play sudoku online for free and print sudoku puzzles free .
Grids online game have multiple options to put the numbers easily, including cadidats. There is an automatic backup system and it is also possible to go back by canceling the last shot.
You can also print the sudoku in game and retouver a grid or a solution.
Different levels of Sudoku are available: easy sudoku, medium hard, expert, evil ... but also 4x4 sudoku child and 6x6 sudoku child.
You can also print free sudoku 9x9 classic of all levels, print 4x4 or print 6x6.