Langer's Sudoku Assistant

Invalid Sudoku!

Column 5 is invalid. Go back and make a different choice.

 

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

 

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