Sudoku X book for beginners including introduction. Sudoku X (also known as Diagonal Sudoku) is a variant of the popular number puzzle. Compared to the rows, columns and blocks, the two main diagonals are also important here. These may also only contain the numbers from 1 to 9 exactly once. In this book you will find: 200 Sudoku X puzzles Introduction to Sudoku X Including all solutions One puzzle per page Large printed grid Suitable for beginners
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