Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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