Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 4 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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