Techniques for Hard Sudoku
14:03
This AMAZING Trick Can Solve Extreme Sudoku
21:56
The Simple Trick For Hard Sudokus
25:11
A Sudoku With Only 4 Given Digits?!
36:09
Tutorial 58. Hard sudoku puzzle with lots of techniques.
1:19:10
Solving A 5* Difficulty Puzzle In 80 Minutes :)
25:48
The Miracle Sudoku
29:09
Easy Solving for HARD Level Sudoku Puzzles: Solve With Me
24:59