Langer's Sudoku Assistant

Invalid Sudoku!

Row 8 is invalid. Column 4 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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