Absolutely Nasty(r) Sudoku Level 4

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.)

Binding Type: Spiral
Publisher: Puzzlewright
Published: 03/01/2007
ISBN: 9781402743993
Pages: 159
Weight: 0.65lbs
Size: 8.90h x 6.50w x 0.50d