Sudoku number 6

Difficulty:

Sudoku is a diagram of nine by nine boxes in which the numbers from 1 to 9 must be entered. The diagram of 9x9 is again subdivided into a box of 3x3. A number from 1 to 9 must be entered in each box.
In order to solve the puzzle, the boxes must be filled in such a way that in each row, every column and each box of 3x3 the numbers 1 to 9 only occur once.

You do not have to be a clever head, just a little patience and logical reasoning is needed to solve the puzzle.

7 2 64 5 3 9 1 8 
3 8 1 7 962 45 
94 582 173 6 
15 4 26 9 3 8 7 
63 7 51 84 9 2
8 9 2 3 7 45 6 1
5 1 398 267 4
4 78 635 1 2 9 
2 6 9 1 4 7 85 3 

First select a number or an edit function (erase for example) and then click in a box of the sudoku.
 
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