Lesson 12 The "outside the puzzle" technique.

This technique I use for all advanced puzzles from medium level and up. This "outside the puzzle technique " is one of the most important procedures needed to go on to more difficult puzzles. Whenever you have 3 or more empty cells in a row, column or block use this technique. If you wish to use your memory, and not put the numbers outside the puzzle, you are welcome to do so. Warning, it may be a challenge as you go to harder puzzles. So glad you found my site. “the most popular site online to learn sudoku” Please share with others, Have fun as you learn step by step to solve. You will find all of my videos below. www.sudokuguy.com Facebook: Sudoku Guy https://www.facebook.com/Sudoku-Guy-6...