Langer's Sudoku Assistant

Invalid Sudoku!

Row 8 is invalid. Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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