Langer's Sudoku Assistant

Invalid Sudoku!

Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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