Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

1
7
9
3
8
2
6
4
5
3
6
2
5
1
4
8
9
7
5
       
4     6
       
8
7
       
      6
      9
       
      6
      9
3
1
2
7
2
8
9
6
1
5
3
4
4
6
1
6
5
8
9
2
3
9
5
3
4
2
7
6
8
1
2
5
6
4
1
7
8
9
3
7
8
9
2
3
5
1
4
6
1
3
4
8
       
      6
      9
       
      6
      9
2
7
5

 

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