Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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