Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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