Sudoku. Tutorial #20 3X3 hints.

#sudoku The 3X3 and 4X4 scenario are very important to spot when doing more difficult puzzles. When you spot a 3X3 it means you have less number of cells to solve, because all remaining cells in a particular row column or block do not need the numbers in the 3X3. For all lessons and tutorials go to: Thought for the day: "A day without laughter is a day wasted"