Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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