Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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