Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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