Langer's Sudoku Assistant

Invalid Sudoku!

Column 5 is invalid. Go back and make a different choice.

 

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

 

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