Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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