Sudoku number 10

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.

5 637 94 1 28
9 4 1 2 8 65 37
2 8 7 53 1 6 49 
17 6 8 25 49 3 
3 5 214 978 6 
8 9 43 67 215
4 15 9 7 83 6 2 
638 842 9 7 1 
7 726 1 18 85

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