Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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