Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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