Become a master in solving Sudoku X 12x12. After solving all the puzzles in this book, you will be a Sudoku X Pro. You start with easy Sudoku X puzzles and you gradually build your way up to extremely difficult Sudoku X puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned!Sudoku X 12x12 - Easy to Extreme is a collection of 276 puzzles: 54 easy Sudoku X 12x12 puzzles 54 medium Sudoku X 12x12 puzzles 54 hard Sudoku 12x12 X puzzles 54 extreme Sudoku 12x12 X 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 puzzle 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 PuzzleBooks.net books.Sudoku X is also known as Diagonal Sudoku, Kokonotsu, Taikakusen Nanpure and Diagonal Line Number Place.