Sudoku interactive 7

Puzzles just like on paper – the first interactive Sudoku eBook series!
• Intuitive filling out • Great additional features • Saves all preliminary results • One download, no further downloads required
Levels of difficulty in this eBook: Level 7 to 9 (difficult. more difficult, very difficult) out of a total of twelve levels
All puzzles have only one correct solution – guaranteed. Top-notch quality by world famous puzzle author Stefan Heine!