Langer's Sudoku Assistant

Invalid Sudoku!

Column 2 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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