Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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