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.

 

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

 

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