Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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