Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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