Langer's Sudoku Assistant

Invalid Sudoku!

Column 6 is invalid. Go back and make a different choice.

 

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

 

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