Do you love to solve difficult Sudoku X 16x16 puzzles? Then you should solve the Sudoku X puzzles in this book. You get to solve extremely difficult Sudoku X puzzles. You do not need to wade through tons of easy Sudoku X puzzles before getting to the real brain teasers. Once you pick up this book, you won't be able to put it back down. You have been warned

Sudoku X 16x16 - Hard to Extreme is a collection of 276 puzzles:

• 108 hard Sudoku X 16x16 puzzles
• 108 extreme Sudoku X 16x16 puzzles
• 60 extra logic puzzles

The goal of Sudoku X is to fill in the empty cells, one number in each, so that each column, row, region, and the two main diagonals contain each number exactly once.

I guarantee that every logic puzzle in this Sudoku X book has been carefully checked to ensure that each puzzle has only 1 solution.

None of the puzzles in this book will appear in any of the other English PuzzleBooks.net books.

Sudoku X is also known as Diagonal Sudoku, Kokonotsu, Taikakusen Nanpure and Diagonal Line Number Place.