Langer's Sudoku Assistant

Invalid Sudoku!

Column 2 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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