Langer's Sudoku Assistant

Invalid Sudoku!

Column 2 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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