Lesson 9 3 empty cells in a block

When there are 3 empty cells in a block, once you have solved one of the empty cells you are left with the famous matching pair, which by now we know is important when solving sudoku puzzles. *ATTENTION TEACHERS: A great resource. PowerPoint lessons, activities, and videos available in a teaching format on Teachers Pay Teachers. https://www.teacherspayteachers.com/S... Facebook: Sudoku Guy https://www.facebook.com/Sudoku-Guy-6... for FAQ go to http://www.sudokuguy.com/ for all videos Robin The Sudoku Guy