Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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