Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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