Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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