Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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