Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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