Tutorial #80 A difficult sudoku puzzle made easy
45:15
Tutorial #81 Elimination Heaven. A neat trick. You can do it. Locked Little Numbers.
14:03
This AMAZING Trick Can Solve Extreme Sudoku
17:59
Techniques for Hard Sudoku
31:15
Sudoku Tutorial #98 The power of triplets and matching pairs.
28:25
Tutorial #78 Sudoku. The Bug +1
20:04
Step-By-Step Method For Hard Sudokus
29:43
Sudoku Tutorial # 88 The many tricks for Matching Pairs.
28:52