Langer's Sudoku Assistant

Invalid Sudoku!

Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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