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.

 

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

 

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