Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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