Х-wing - Sudoku technique
Sudoku X-Wing technique: when and how to use
HoDoKu: Solving Techniques - Basic Fish (X-Wing, Swordfish, Jellyfish)
Jigsaw Sudoku X: 200 Medium Jigsaw Sudoku X Puzzles Volume 1: Demarco, Christian: 9781983769689: Amazon.com: Books
Sudoku X Wing
X Sudoku Puzzles by KrazyDad
puzzlemix.com: How to solve Sudoku-X puzzles
SudokuWiki.org - X-Wing Strategy
450 Sudoku Variants: Jigsaw-Sudoku, Sudoku-X, Windoku, Girandola-Sudoku, and Argyle-Sudoku Puzzles (Paperback) | Hooked
Sudoku X - Easy - Sudoku-Puzzles.net
Dan Rice's Sudoku Blog: X-Wings
X Wing – Sudoku Beginner
BrainBashers - Sudoku - X-Wing
Cross+A :: Sudoku
Sudoku Variety Puzzle Books : Sudoku Variations Puzzle Books Featuring Sudoku X & Sudoku Hyper (Paperback) - Walmart.com
An example Sudoku X puzzle | Download Scientific Diagram
500+ Sudoku X: 500+ Normal and Hard Sudoku X Puzzles with Solutions - Vol. 1: books, visupuzzle: 9798591456641: Amazon.com: Books
X-Sums Sudoku (Daily Sudoku League #154)
