Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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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