Weekly Extreme Sudoku Competition for Dec 8 to Dec 14

Number 377, Extreme
by Crosswords Ltd. December 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 7     1     6 3
3       6   1   2
                 
    8     1 2    
      5 3 2      
    4 6     5    
                 
1   3   7       6
7 8     5     2 4