20:04

Sudoku. Lesson 2 vertical blocks using LCR and Ram

18:41

Lesson 4. Learn Sudoku. Very Important hints.

19:34

Sudoku Was Hard Until I Understood These 7 Concepts

28:33

Lesson 12 Sudoku. The Outside the puzzle technique

20:06

Lesson 2: Learn sudoku.Vertical Blocks using LCR and Ram