Langer's Sudoku Assistant

Invalid Sudoku!

Row 5 is invalid. Column 6 is invalid. The top center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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