Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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