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Puzzlewright

Beyond Black Belt Sudoku: If You Have to Ask, It's Too Hard for You

Beyond Black Belt Sudoku: If You Have to Ask, It's Too Hard for You

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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 life.

It's the most challenging sudoku book we've ever published!

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