Langer's Sudoku Assistant

Invalid Sudoku!

Row 5 is invalid. Column 8 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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