The Sudoku Swordfish: An X Wing Variant with a 3x3 Rectangle
23:07
Solving a Medium Level Sudoku Puzzle: X Wings, Locked Candidates, and Matching Pairs
9:17
The XY Wing a.k.a. the Y Wing: A Useful Sudoku Solving Technique When You Are STUCK !!!
16:57
Sudoku Tricks: The X-Wing And How To Spot It
29:19
Solving a Hard Level Sudoku Puzzle with Skyscraper Swordfish AND Forced Chains!!!
23:33
Swordfish Sudoku: Pattern Recognition
14:03
This AMAZING Trick Can Solve Extreme Sudoku
14:18
Empty Rectangle and the LOGIC Behind It
17:59