Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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