Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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