Sudoku-Utopia ─ 336 Puzzles to Blow Your Mind!

Sudoku addicts—this is your utopia for puzzle perfection! With 336 fabulous Sudoku, divided into medium, hard, and very hard, this oversized, fun-filled collection gives solvers hours of entertainment and a chance to build their skills. Give yourself a real mental workout. Start with the solutions for four different solving strategies. Learn how to exclude options by finding a box where only one number is possible; situate the right number; recognize patterns; and do "framesecuring"—a technique that’s helpful when completing the most difficult Sudoku.
Created by two of the world’s best puzzle masters, Sudoku-utopia offers an unforgettably challenging, mind-blowing, brainteasing, logic-building experience!

PeterFrank was founded in 2000 by Peter De Schepper and Frank Coussement. Their internationally registered trademark, BrainSnackR, stands for challenging, language-independent, logical puzzles and mind games for kids, teens, and adults. It also stands for high-quality puzzles. Whether they are made by hand like the visual puzzles or generated by computer like Sudoku, all puzzles have been tested by the target group they were made for. In order to guarantee that the computer-generated puzzles can actually be solved by humans, they make programs that only use human logic algorithms.