Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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