Langer's Sudoku Assistant

Invalid Sudoku!

Column 5 is invalid. Go back and make a different choice.

 

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

 

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