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Absolutely Nasty Sudoku Level 4 by Frank Longo
Macy's
Absolutely Nasty Sudoku Level 4 by Frank Longo
From Barnes & Noble
Current price: $11.99
Macy's
Absolutely Nasty Sudoku Level 4 by Frank Longo
Current price: $11.99
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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).