Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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