5986446
9781402744280
Do you dare? Wrap your brain around the XY-Wing, XYZ-Wing, Alternating Digits, Extended Gordonian Rectangle, Multi-Digit One-Sided Gordonian Rectangle, Gordonian Polygon, One-Sided Gordonian Polygon, Jellyfish, Finned X-Wing.Longo, Frank is the author of 'Cranium-Crushing Friday Sudoku', published 2008 under ISBN 9781402744280 and ISBN 1402744285.
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