Langer's Sudoku Assistant

Invalid Sudoku!

Column 3 is invalid. Go back and make a different choice.

 

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

 

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