Sudoku number 9

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.

1 9 6583 247
54 72 693 1 8
823 1 7456 9 
97283 61 54
4 6 1 7 52 9 8 3 
3 85 49 16 72
718 92 54 36
659 3 4782 1
23 46 187 95 

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