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One of the most powerful techniques in Classic Sudokus !
How To Do Hard Sudokus In 10 Minutes
One Of The Best Classic Sudokus Ever
This trick is like a sorcery in Classic Sudokus !
Y-wing (XY Wing) - an Advanced Sudoku technique
A powerful technique is required to finish this beautiful classic sudoku !
A classic sudoku with a host of powerful techniques !
Triples: the Single Most Important Sudoku technique?
Top Nine Most Often Used Strategies for Solving Expert Sudoku Puzzles
The Expert's Sudoku Technique
Triplets (a.k.a Triples) and Hidden Triplets Explained - A Sudoku Strategy You MUST Know
A Great Technique in a Classic Sudoku
