With Enjoy Sudoku play Sudoku with hints that teach and unlimited games at 16 levels you will love Enjoy Sudoku. Sudoku tutorial, extensive feature set, and advanced multi-stage hint system offer something for everyone. The more you play, the more you will Enjoy Sudoku. Our multi-stage hint system starts with a gentle reminder to get you back on track and works up to an illustration of the exact technique to use and how it applies to the current board. Use our hints to ease those frustrating moments and to learn how to be a better player. Features include unlimited Sudoku puzzles, 16 difficulty levels, tutorial teaches you new techniques, UI optimized for fewer touches, supports phones and tablets, multi-level undo and redo, automatic or manual pencil marks.