Langer's Sudoku Assistant

Invalid Sudoku!

Column 5 is invalid. Go back and make a different choice.

 

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

 

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