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.
Really stretch your brain with other great logic puzzles like Yubotu (Battleship Solitaire),
where you need to logically work out where the fleet of ships are located in the grid.
How about Suguru? - great number logic puzzle.
Or try NonogramsNew, Tents, Hitori, Pearls or play a game of Merels against the computer.