Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 2 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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