Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 6 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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