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Absolutely Nasty® Sudoku Level 4

On sale

3rd May 2007

Price: £8.99

Selected:  Spiral bound / ISBN-13: 9781402743993

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Top solvers can try their hand at the One-Sided Gordonian Rectangle; Extended Gordonian Rectangle; Gordonian Polygon; and Alternating Digits. (But they can take comfort in knowing that no more than one will occur in any single puzzle.)