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4:28
X-Wings and the Rectangle Rule for Solving Medium to Hard Sudoku Puzzles
1:11
Х-wing - an Advanced Sudoku technique
1:19
Y-wing (XY Wing) - an Advanced Sudoku technique
14:47
In which I solve an EXTREME SUDOKU for Twitter
37:08
Sudoku Tutorial #62. How to spot an X wing using rows, and then knowing what to do!
24:01
Sudoku X - Rules & Strategies
12:07
How To Do Hard Sudokus In 10 Minutes
1:05
Sudoku X Rules
