Langer's Sudoku Assistant

Invalid Sudoku!

Column 4 is invalid. Go back and make a different choice.

 

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

 

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