Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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