About Sudoku
Game Features:
1. Absolutely Free
2. 3 Difficulty Levels – Easy, Normal & Hard
3. Notes
4. Undo / Redo
5. Autosave & Resume Game
Special Features:
1. YELLOW color for same row, column and block
2. BLUE color for all same numbers
3. RED color for duplicate numbers
by C####:
No option for automatic pencil marks!