Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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