Solve Sudoku without guessing?

Below left the square comes the 4 in the middle, because left and right does not go.

And the two behind it.

Then there’s only the first.

Upper square:

after 4 the 2, then the 8

then only the 1 left in the 2nd quarter under the 7

in the middle square below 7 the 1

and then only the 3

middle square left row, lower row, 2nd number = 8, then for the middle only the 9 remaining

then remains in the back middle square at the bottom in the middle the 9

you are making