Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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