Langer's Sudoku Assistant

Invalid Sudoku!

Column 8 is invalid. Go back and make a different choice.

 

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

 

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