Genius-Level Sudoku: Over 300 Super-Difficult Puzzles from the Japanese Masters Who Invented the Game

challenging and well crafted sudokus.

Rating Sudoku puzzles is hard because a puzzle might be easy for one person but hard for another. This book provides about 80 puzzles rated hard, about 100 rated as Extreme and about 150 puzzles rated Ultimate. Many of the hard puzzles are fairly straight forward as long as you know how to identify candidates for cells and understand how to use pairs and triplets. Then there are a few that are more interesting. It's helpful to understand more advanced techniques such as X Wings and Swordfishes to solve some of the hard, the extreme and ultimate puzzles. I'm still working through the puzzles but haven't encountered any that would be described as "Evil". I've bought several Sudoku books, many of which were disappointing because they were simple. This book is by far one of the best set of puzzles compiled since Longo's Blackbelt series. Challenging puzzles and hours of fun!

Difícil de encontrar o livro. Mas o nível é super difícil . Só para experts . Excelente

A good book of Sudoku with some challenging puzzles

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