Sudoku no longer satisfies? Try Str8ts, a new type of brain buster that adds the twist of sequential numbering to sudoku. The digits 1-9 are still in play, appearing only once in each row and column, but now black squares break up the action, and each consecutive group of white squares must contain numbers that make up a straight, in any order. Any way you look at it, Str8ts adds up to challenging fun!

Includes 2- and 4-player scoresheets, advanced tile-tracking grids, and players' pocket word lists.

Run for cover, because Mutant Sudoku is on the loose! Thomas Snyder and Wei-Hwa Huang are both U.S. Sudoku Champions, and they’ll have you filling in grids of all shapes and sizes, testing parts of your logical mind that have never been tested before. You will marvel at the ingenuity within these pages, and after experiencing the power of these Mutant Sudoku, normal 9 x 9 puzzles will never seem the same again.

The "Hidden Logic of Sudoku" provides the first systematic perspective of the logical symmetries of the popular game. These are fully exploited to define new graphical representations, new kinds of resolution rules and a precedence ordering of the rules consistent with their logical complexity. The set of rules defined in the book is illustrated with a hundred of puzzles together with their full resolution paths. It suffices to solve almost any puzzle without making guesses or assuming the uniqueness of a solution. It has been fed into an Artificial Intelligence (AI) engine and a large database of puzzles has been processed, leading to a precise evaluation of the efficiency of each rule. The book is intended for both advanced Sudoku players (who will discover many new facets of the game and a new, systematic approach to the resolution rules) and for teachers or students of Logic or AI (who will appreciate the strict logical foundations).

Its time to break out of the box: the traditional 3x3 puzzle box, that is! This assortment of engaging and challenging variants takes sudoku up a notch. The creative twists include overlapping and unusually shaped grids, special rules that make solvers up their game, and even super-large sudoku for an extra-fun experience.

Nikolis McQuaige (NikkiMac) is forty years old, single, female, and a Christian. Like many of us, she has a colorful history, but, she knows that her sins were forgiven when she came to Christ ten years ago. Although shes determined to live a faithful Christian life, Nikolis experiences a tug-of-war between the flesh and the spirit. Sometimes, she doesnt measure up to what God expects of her, but, she gets right back up when she falls. Over time, she may realize that faithful Christian living is not achieved by willpower alone, but by a dependence upon God. Along the way, youll meet some of the warm, spirited, and often humorous members of the church where she worships. Its urban neighborhood provides soulsaving challenges to the church, but, the faithful members must press on. Will Nikolis stay out of her own way and let God direct her steps? Her account of what goes on Behind Church Doors is an intriguing look at how imperfect people travel the pathway to a perfect God. Join the journey!

Have you worn out all of your pencils mastering ever-changing Sudoku puzzles? Have you stepped up your game to the next level and now seek something a little more demanding? Do you crave the challenge of more cunning, deadly Sudoku? Extreme Sudoku For Dummies features 236 beyond diabolical puzzles to challenge even the most skilled expert—perfect for anyone who wants to be a true Sudoku master. In this book you will not only discover some amazingly tricky Sudoku puzzles, but also face new challenges in the form of Killer Sudoku, Irregular Sudoku, and other recently developed variations. And you won't need to rely on guesswork—you'll find an easy-to-understand, logical approach that will help you tackle even the most difficult puzzles in the book. Extreme Sudoku For Dummies offers: An overview of Sudoku basics Variations such as 9 x 9, 12 x 12, 16 x 16, jigsaw, circular, and killer puzzles Useful strategies to filter out candidates and solve puzzles, one step at a time The lowdown on advanced strategies such as Naked Pairs, Naked Triplets, Hidden Pairs, X-Wing, Y-Wing, and other techniques Time completion estimates so that you can use the clock to measure your progress and ability Along with a wealth of puzzles that will test every Sudoku player's skill, Extreme Sudoku For Dummies provides the tips, tricks, advice, and strategies to help you become a true master of the game.