Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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