Langer's Sudoku Assistant

Invalid Sudoku!

Row 8 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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