Langer's Sudoku Assistant

Invalid Sudoku!

Column 3 is invalid. Go back and make a different choice.

 

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

 

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