Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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