Langer's Sudoku Assistant

Invalid Sudoku!

Column 9 is invalid. Go back and make a different choice.

 

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

 

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