This book contains
203 Sudoku puzzles of difficulty "HARD".
It is meant for the expert players and everyone who enjoys playing Sudoku.
Keep your brain fit and young with Sudoku!
For the players' convenience is the solution to each puzzle always included only a few pages after the puzzle.
Small format, though large, very readable print on white paper.
Short instructions for beginners are included
All solutions included
The book has extra wide center margins, so you can solve all puzzles well, even if you want to fold the pages or separate out individual puzzles.