Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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