- New original concept of Sudoku - 3 challenge types for Sudoku enthusiasts : - CLASSIC / DETECTIVE / PUZZLE - Unlimited number of solvable boards - 5 difficulty levels from VERY EASY to EXPERT - 2 view modes : DAY and NIGHT - Unlimited number of UNDOS and REDOS including pencil marks - Games can be reset, paused and continued anytime - Automatically saved games to resume later - Best time saved for each difficulty level - Visual help to be selected anytime - NO ADS - NO internet connection required - Optimized small size application