Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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