Langer's Sudoku Assistant

Invalid Sudoku!

Column 2 is invalid. Go back and make a different choice.

 

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

 

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