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.

 

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

 

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