Playing sudoku actually exercises your brain extensively and it can improves your memory, stimulates your mind, increases your concentration power and makes you feel happy when you can solve a puzzle. In this book, there are 200 sudoku puzzles from easy to very-challenging. There are plenty of puzzles for you to enjoy: There are 50 EASY, 50 MEDIUM, 50 HARD and 50 VERY HARD puzzles, if you want a real challenge. Features:...
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