Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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