Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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