Langer's Sudoku Assistant

Invalid Sudoku!

Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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