Langer's Sudoku Assistant

Invalid Sudoku!

Column 7 is invalid. Go back and make a different choice.

 

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

 

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