Langer's Sudoku Assistant

Invalid Sudoku!

Row 1 is invalid. Column 4 is invalid. The top center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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