Langer's Sudoku Assistant

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

 

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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