Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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