Beyond Black Belt Sudoku: If you have to ask, it's too hard for you. by Frank Longo

Beyond Black Belt Sudoku: If you have to ask, it's too hard for you.

Frank Longo

192 pages • first pub 2011 (editions)

informative inspiring reflective medium-paced
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For diehards only These incredibly difficult puzzles are handcrafted for the sudoku warrior who dares to go where other solvers fear to tread. So, if you're armed with the highest-level strategies, get ready for the most satisfying fight your lif...

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