More than 1000 puzzles each one with its own score based on difficulty. 5 levels:- Easy – Medium- Hard – Epic (just for Braveheart)- Special (discover by yourself)Take advantage from: – Hints – Autopencil Mark- Undo- Snapshots- Special Coloring System- World Leaderboards- Achievements- Multilanguage (English,Italian,French,Spanish)Funny and convenient. A wonderful Sudoku experience.Challenge your friends on internet, gain all the achievements and become a SUDOKU MASTER.Powered by OpenFeint.