Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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