Langer's Sudoku Assistant

Invalid Sudoku!

Row 5 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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