Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

Start Over

Take any Sudoku puzzle you are having trouble with -- or any one at all -- and enter the initial values. With each entry the proscribed options are eliminated for you

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