X-Factor SuDoku (Paperback) (ISBN-13: 9781440122026)

X-Factor puzzles follow the same rules as for regular SuDoku puzzles PLUS the two shaded diagonal regions also contain the numbers 1 to 9 once only.

Each X-Factor puzzle is joined to a previous and following puzzle through common puzzle solution numbers. As well, this book is an extension of "The World's Longest SuDoku Puzzle", now at 1,271 puzzles in length.

Includes strategy guide for solving SuDoku puzzles, and tips on how to find X-Factor numbers. And for those who still can't get enough, try solving 275 riddles!

Joe Defries is a current 2-time Guinness World Record holder, and is the joe in suJoku.com & joe-ks.com (the Largest Source of Internet Humour). Betcha Can't Beat That!*

* re Joe's 'super-human puzzling feat' - the World's Longest SuDoku Marathon - as published in "The Addict's Guide to Everything Sudoku" by Fiorella Grossi, Fair Winds Press, 2007

Author: Joe Defries
ISBN-10: 1440122024
ISBN-13: 9781440122026
Publisher: iUniverse
Language: English
Published: 02/05/2009
Pages: 328
Format: Paperback
Weight: 0.72lbs
Size: 8.00h x 5.00w x 0.69d