Weekly Extreme Sudoku Competition for Dec 6 to Dec 12

Number 742, 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
    7   3        
6     2   4      
  3             7
8 4       7     9
    9       1 2  
  5   1         8
5             7  
      5   9     1
        6   8