Diagonal Sudoku Compendium: 160 puzzles with an X

By djape

The Power of the X: 160 Diagonal Sudoku Challenges

A comprehensive collection of Diagonal Sudoku puzzles. Also known as Sudoku X, this format adds one critical rule to the standard game: both main diagonals running corner-to-corner must contain the digits 1 through 9.

In the harder grids, this diagonal constraint is absolutely mandatory to break the logic lock. The introduction teaches you how to leverage this constraint to spot powerful new patterns. Verified unique solutions.

• Format: Paperback
• Language: English
• ISBN: 1492929786
• ISBN13: 9781492929789
• Release Date: October 2013
• Publisher: Createspace Independent Publishing Platform
• Length: 124 Pages
• Weight: 0.39 lbs.
• Dimensions: 0.3" x 6.0" x 9.0"