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More about the book
Taking a page from karate - another Japanese art - each title in the series is graded by colour: White Belt for easy, Green Belt for medium level, Brown Belt for hard, and Black Belt for the super-tough solvers. Each title also contains 300 puzzles.
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Black Belt Sudoku (R), Michael Rios
- Language
- Released
- 2005
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- (Paperback)
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