Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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