Methods for solving Sudoku

Sudoku can be solved in different ways.
Below are the most commonly used methods.

Method 1: remaining numbers in a row or column

In the picture below in the green column is to place 8 and 3.
But that in the blue line is 3, must therefore be 8, because 3 is no longer possible.
With more and more filled with numbers puzzle becomes easier.

Method 2: Result of numbers

The second method is to evaluate the current numbers.
In the example below, some of the already filled in row number 4 and 6, the top two rows are completed 6.
In the 5-row must, therefore, be 6, but only the right side.