✓Sudoku Puzzle - Sudoku Classic has 4 difficulty levels - Easy, Medium, Hard and Expert. Great for Sudoku beginners and advanced players.
✓Three modes: 6 Sudoku mode from 1-6, 9 Sudoku mode from 1-9, 12 Sudoku mode from 1-9+abc
✓Daily Challenges - Challenge your own time record.
✓ Pencil Mode - Turn on/off Pencil Mode as you want.
✓ Avoid repeating numbers in rows, columns and blocks.
✓ Smart hints - guide you through numbers when you get stuck