Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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