Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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