Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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