Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Go back and make a different choice.

 

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

 

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