Techniques 2: Basic Method

The easiest way to discover a number is when there is only one number left in a row, column or quadrant. In this case the missing number goes into the only empty box.

Lesson 2

As you can see, the first row is located all the numbers but the 7, so in the empty cell you can only go this number. In the first column something similar happens with 5, just like in the sixth quadrant with 1.

Free Sudokus and puzzles to play online and PDF to print and download.
Tips for solving sudokus and free books with sudokus.
About us © 2005-2020