Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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