Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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