Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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