Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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