Langer's Sudoku Assistant

Invalid Sudoku!

Column 8 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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