For those who find regular sudokus too easy, this huge puzzle adds excitementto the popular game.

Packed with more than a hundred color illustrations and a wide variety of puzzles and brainteasers, Taking Sudoku Seriously uses this popular craze as the starting point for a fun-filled introduction to higher mathematics. How many Sudoku solution squares are there? What shapes other than three-by-three blocks can serve as acceptable Sudoku regions? What is the fewest number of starting clues a sound Sudoku puzzle can have? Does solving Sudoku require mathematics? Jason Rosenhouse and Laura Taalman show that answering these questions opens the door to a wealth of interesting mathematics. Indeed, they show that Sudoku puzzles and their variants are a gateway into mathematical thinking generally. Among many topics, the authors look at the notion of a Latin square--an object of long-standing interest to mathematicians--of which Sudoku squares are a special case; discuss how one finds interesting Sudoku puzzles; explore the connections between Sudoku, graph theory, and polynomials; and consider Sudoku extremes, including puzzles with the maximal number of vacant regions, with the minimal number of starting clues, and numerous others. The book concludes with a gallery of novel Sudoku variations--just pure solving fun! Most of the puzzles are original to this volume, and all solutions to the puzzles appear in the back of the book or in the text itself. A math book and a puzzle book, Taking Sudoku Seriously will change the way readers look at Sudoku and mathematics, serving both as an introduction to mathematics for puzzle fans and as an exploration of the intricacies of Sudoku for mathematics buffs.

The sudoku craze keeps growing, with no end in sight--and as its popularity builds, fans keep an eagle eye out for fresh formats featuring their favorite puzzles. Here’s one sure to draw them in: sudokus that add a little spice to the mix by changing the standard 9 x 9 puzzles to 10 x 10. That means solvers get 100 squares to fill in instead of just 81! And the numbers go from zero to nine, rather than one to nine. Plus, the smaller sections within each grid are no longer 3 x 3: half the puzzles feature rectangular 5 x 2 boxes and the rest come in various random shapes, with heavy lines marking out the separate areas. It may seem daunting at first--but it’s fun!

"The Big Book of Visual Sudoku" reinvents the world's most popular number game by adding a second visual layer on top of the traditional number/logic puzzle--using symbols and pictures instead of numbers. It's a paradigm shift; 273 puzzles that present Sudoku for both sides of the brain, left (the logical) and right (the visual).

Challenge your brain--but not your eyes--with this classic collection or large print sudoku puzzles! 125 sudoku puzzles organized into five difficulty levels, from easy to expert. Sudoku grids are large, easy to read, and simple to fill out. Answer key in the back of the book. Spiral bound, 160 pages. Boost your brainpower with these fun and engaging large print sudoku puzzles!

Catch the latest wave in Sudoku-mania! These 275 X-Factor SuDoku puzzles are for the diagonally challenged, in 6 difficulty levels from Simple to Fiendish. 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

If you're an experienced sudoku puzzle solver looking for a real challenge, then the World's Hardest Sudoku Book: 200 of the World's Toughest Sudoku Puzzles (Volume 2) is the book for you. This book features an additional 200 extremely hard sudoku puzzles that will test your skills and mental agility. These are not your average sudoku puzzles - they are designed to be a true test of your puzzle-solving abilities. Whether you're a seasoned sudoku samurai or just starting out on your puzzle-solving journey, this book is sure to provide you with hours of challenging, satisfying, and ultimately rewarding gameplay. With 200 hard sudoku puzzles to solve, this book will keep you entertained and engaged for hours on end. Are you up to the challenge?

If you want to learn the basics of playing Sudoku puzzles quickly and easily for newbies and beginners, then get this "How To Play Sudoku" guide. In this step-by-step guide, you will rep the following benefits: - Be familiar with the the game rules. - Learn the basic way of doing Sudoku. - Get useful tips in solving Sudoku puzzle. - Be able to solve Sudoku puzzle in the shortest time possible. - Learn how to appropriately choose a candidate. - Solve different levels of Sudoku puzzle. - Amaze your friends and family to your new found hobby of solving sudoku. - And much more! Click "Buy Now" to get it now!