Langer's Sudoku Assistant

Invalid Sudoku!

Row 2 is invalid. Column 6 is invalid. The top center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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