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(Paperback)
Sudoku Puzzles for Everyone, From Novices to Masters! At home, while commuting, during lunch hours...people around the world are eagerly working on Sudoku puzzles whenever and wherever they can!
Created in the United States, these intriguing conundrums were originally called Number Place puzzles. Their recent rise in popularity began in Japan, where the name translated as sudoku. Here we've indicated the skill level necessary to complete each sudoku book in this series in the same way Japanese karate levels are ranked: by different colored belts. This is the Black Belt volume, filled with puzzles that will provide a sly, absorbing test for even the best, most proficient experts.
It's impossible to complete only one sudoku at a time, because solving them is habit-forming!
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September 13, 2009: I'm hooked on Michael Rios and this series! Tough enough to be a challenge while being achievable. I've even bought this one more than once.
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August 22, 2009: The title would indicate this to be a much harder collection of puzzles. Still challenging, but most puzzles are easily solved in one sitting.
I Also Recommend: Simply Sinister Sudoku, Second-Degree Black Belt Sudoku, Martial Arts Sudoku Level 9, Absolutely Nasty Sudoku Level 3, Absolutely Nasty Sudoku Level 4.