Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 9 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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