Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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