Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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