Langer's Sudoku Assistant

Invalid Sudoku!

Row 8 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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