X-Wings and the Rectangle Rule for Solving Medium to Hard Sudoku Puzzles
6:12
The Sudoku Swordfish: An X Wing Variant with a 3x3 Rectangle
14:03
This AMAZING Trick Can Solve Extreme Sudoku
14:18
Empty Rectangle and the LOGIC Behind It
9:31
Triplets (a.k.a Triples) and Hidden Triplets Explained - A Sudoku Strategy You MUST Know
17:59
Techniques for Hard Sudoku
12:07
How To Do Hard Sudokus In 10 Minutes
20:17
2 AMAZING Sudoku Tricks That Changed My Life
17:53