Absolutely Nasty(r) Sudoku Level 4 (Spiral) (ISBN-13: 9781402743993)

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.)

Author: Frank Longo
ISBN-10: 1402743998
ISBN-13: 9781402743993
Publisher: Puzzlewright
Language: English
Published: 03/01/2007
Pages: 160
Format: Spiral
Weight: 0.65lbs
Size: 8.90h x 6.50w x 0.50d