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Title: Too easy to claim a "Black Belt" title
Review: I was looking for a challenging book and the booked looked promising as the book cover rated the "super tough" and the back says it will test even the best, most proficient experts" NOT!!!I would give the puzzles a "moderate" rating and the difficulty does not increase toward the end of the book which was disappointing. I did improve my solving speed and honed my pattern recognition skills but did not encounter or require any of the more advanced solving techniques.
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