Langer's Sudoku Assistant

Invalid Sudoku!

Column 6 is invalid. Go back and make a different choice.

 

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

 

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