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.

 

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

 

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