Tutorial #56. A difficult puzzle solved from beginning to end. Lots to learn.
2:24
Tutorial #57 Chain of pairs.
30:27
Lesson 7. Learn sudoku. The cross /meet technique.
31:50
Tutorial #80 A difficult sudoku puzzle made easy
50:47
Tutorial #79 A sudoku Puzzle to blow your mind.!!! Locked little numbers.
37:08
Sudoku Tutorial #62. How to spot an X wing using rows, and then knowing what to do!
26:04
Tutorial #50 Solving a hard puzzle from the beginning to the end
40:01
Sudoku Tutorial #97 a puzzle for all levels. Includes finned X wing.
31:15