Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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