Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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