Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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