When it comes to Sudoku, we have it covered.
See for yourself why over 70 million puzzles have been served since we started in 2005.
Like variation? Try our 5-grid Samurai Sudoku, or if thats too easy, there is the unique 7-grid Shichi Sudoku, or maybe give Killer Sudoku a go.
Or, for your competitive side, there's Sudoku Points where you simultaneously solve the same puzzle as others.