Weekly Extreme Sudoku Competition for Dec 6 to Dec 12

Number 481, Extreme
by Crosswords Ltd. October 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     4     3
3     8   1      
    8       7    
      4     1   5
7 5           8 9
9   1     5      
    7       6   1
      7   3     2
1     2