Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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