Langer's Sudoku Assistant

Invalid Sudoku!

Row 5 is invalid. Column 3 is invalid. The bottom left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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