Sudoku number 28

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.

2 4 5 97 8 6 1 3
378 6 2 1 4 9 5
9 6135 4 287 
5 26 7 1 9 3 4 8 
4 8 7 536 9 2 1
1 3 9 8 4 2 5 76 
61 4 2 8573 9 
75 2 19 3 8 6 4
8 93 4 6 71 5 2 

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