Langer's Sudoku Assistant

Invalid Sudoku!

Column 7 is invalid. Go back and make a different choice.

 

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

 

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