Langer's Sudoku Assistant

Invalid Sudoku!

Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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