Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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