Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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