Langer's Sudoku Assistant

Invalid Sudoku!

Row 2 is invalid. Column 1 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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