Langer's Sudoku Assistant

Invalid Sudoku!

Column 4 is invalid. The top center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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