Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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