Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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