Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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