Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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