Langer's Sudoku Assistant

Invalid Sudoku!

Row 7 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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