Langer's Sudoku Assistant

Invalid Sudoku!

Column 3 is invalid. Go back and make a different choice.

 

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

 

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