Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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