Langer's Sudoku Assistant

Invalid Sudoku!

Column 4 is invalid. The top center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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