Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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