Weekly Extreme Sudoku Competition for Dec 11 to Dec 17

Number 273, Extreme
by Crosswords Ltd. August puzzle packs Now Out!. Thanks for supporting our site.
Future Puzzle - will be submitted on the relevant day
1 2 3 4 5 6 7 8 9
A
B
C
D
E
F
G
H
J
    5           9
9     3       6  
          6 2    
    4   2 3 9   6
    1       5    
3     6 9   7    
    3 7          
  8             5
4           1