Langer's Sudoku Assistant

Invalid Sudoku!

Row 7 is invalid. Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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