Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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