Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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