Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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