Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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