Langer's Sudoku Assistant

Invalid Sudoku!

Row 1 is invalid. Column 4 is invalid. The top center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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