Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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