Third-Degree Black Belt Sudoku

Front Cover
Sterling Publishing Company, Inc., 2009 - Games - 192 pages
3 Reviews

Watch out--these sudoku might crush even the most stalwart of solvers!


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tough enough to be fun

User Review  - kateanne -

My husband needs a little more challenge than the easy or intermediate puzzles. This book is great we dont pay for simple puzzles he wouldnt bother to work. Read full review

User Review - Flag as inappropriate

I'm enjoying this book, but it is not hard enough. I think one way to up the ante would be to time yourself on each puzzle.

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