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Lesson 21.Sudoku. The Xwing plus scenarios.
X-Wings and the Rectangle Rule for Solving Medium to Hard Sudoku Puzzles
Sudoku Tricks: The X-Wing And How To Spot It
Lesson 21. Sudoku For Kids TMB plus ram (ramifications)
Advanced Sudoku: Spotting The X-Wing
Sudoku Tutorial #62. How to spot an X wing using rows, and then knowing what to do!
Sudoku Tutorial #11-A / X Wing Examples & Tips
Sudoku Solving Tip - X Wing Technique
Sudoku Mastery: The Y Wing (or XY Wing)
Sudoku. Tutorial #21 Danger Danger!! (unique rectangle)
Advanced Sudoku: X-Wing Into Skyscraper
Sudoku Demonstration - X-Wing Technique (Example 01)
