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.

 

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

 

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