Weekly Extreme Sudoku Competition for Dec 10 to Dec 16

Number 586, Extreme
by Crosswords Ltd. January 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
    4       7   3
5             8  
    3 8   2      
        5 4 6    
3       6       4
    6 2 7        
      1   5 9    
  9 5           2
8   2       3