Extreme Sudoku: 100 Challenging Puzzles by Will Shortz (Paperback, 2011)

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Price:
AU $24.06
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Estimated delivery Mon, 13 May - Fri, 17 May
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So you think you're tough enough?. This collection of puzzles was created for only bravest sudoku solvers. Many may attempt to master them but only the sharpest minds will succeed. But if you find yourself pulling out your hair in frustration, don't say we didn't warn you.