Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 9 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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