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 basicsVariations such as 9 x 9, 12 x 12, 16 x 16, jigsaw, circular, and killer puzzlesUseful strategies to filter out candidates and solve puzzles, one step at a timeThe lowdown on advanced strategies such as Naked Pairs, Naked Triplets, Hidden Pairs, X-Wing, Y-Wing, and other techniquesTime completion estimates so that you can use the clock to measure your progress and abilityAlong 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.