X-Treme Sudoku

The Japanese creators of these handmade Sudoku puzzles are my favorite. Their process of solving is intuitive yet challenging. Quickly going through all the easier books by the editors at Nikoli Publishing (Easy, Intermediate, Hard/Difficult, etc.) I have gone through five of these X-TREME books, starting a new book after finishing all 320 puzzles. It was time to move on. Now am tackling their Genius-Level Sudoku book.I quickly tire of computer-generated Sudoku puzzles. They don't read your mind like the makers of these puzzles do. The X-treme Sudoku book contains 320 puzzles: Difficult and Very Difficult. Just FYI the Genius-Level book has 318 puzzles: Expert, X-treme and Ultimate.These little books are only 4"x6" and are easily slipped into a bag to take to appointments, on road trips or the beach. The black cover of the X-TREME and the red cover of the Genius-Level make them easy to find.For the money you can't do better than Nikoli Sudoku puzzles. For less than $11 you'll get a lot of entertainment value.

Ótimo desafio para quem gosta de sodoku. Vale a pena

Si te gusta el Sudoku pasarás muchas horas divertido.

This really is extreme sudoku from the grand masters themselves.My solving was stagnating and indeed, I had given up on finding puzzles that were not only hard enough but entertaining enough (you'd be surprised how difficult it is to find that combination) and then I came across this book. Nikoli have been hand-making puzzles for the Japanese market for over twenty years and know their puzzle making well. These puzzles are very well crafted, very elegant - not only to look at but to solve - and head-scratchingly difficult.If you like to struggle with your puzzles, take three days and/or several attempts at the same puzzle, then this is the book for you. They are all solved by logic alone, no guessing required, and are a joy to solve and a beauty to behold - there's something very aesthetic about a well balanced puzzle and even more so in one that has a defined pattern (this seems to make it harder to solve for some reason) and several of the puzzles have a defined pattern.With 320 puzzles it's also very good value for money.For those of us who have outgrown the newspapers and mass market publications and prefer logical, well balanced and aesthetic puzzles then this book is a challenge not to be missed.Well done and all respect to Nikoli.

Given as a present and well received by someone who likes more difficult puzzles