Sudoku Classic Fun:6400 Levels

6000+ unique number puzzles to give your mind a real workout! Features: 1. 4 difficulties from easy to master. 2. Auto save progress of each level and you can continue whenever you are free. 3. Highlight duplicates and conflicts to avoid repeating numbers in a row, column and block. 4. Make notes to keep track of possible numbers in the free cell. 5. Hints, auto-check, and duplicates highlight. 6…