Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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