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.

 

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

 

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