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.

 

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

 

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