Quad (Hyper) Sudoku

Looking for another SuDoku challenge? These 234 Quad (also known as Hyper) puzzles provide an extra source of puzzle-meant in 5 difficulty levels-from Easy to Fiendish.</p>Quad puzzles follow the same rules as for regular SuDoku puzzles PLUS there are 4 (Quad!) extra shaded regions where each region also contains the numbers 1 to 9 once only.</p>Each Quad puzzle is joined to a previous and following puzzle through common puzzle solution numbers. As well this book is an extension of <i>The World's Longest SuDoku Puzzle</i>.</p>Includes strategy guide for solving SuDoku puzzles and tips on how to find Quad numbers. And for those who still can't get enough try solving the 234 riddles!</p>Joe Defries is a current 2-time Guinness (TM) World Record Holder and is the joe in suJoku.com & joe-ks.com (the Largest Source of Internet Humour).</p>Look for more unique SuDoku puzzles in our upcoming 2fer Puzzle Series including Music & Symbool SuDoku. You're well on your way to becoming a SuJokuholic!