Weekly Extreme Sudoku Competition for Dec 4 to Dec 10

Number 272, Extreme
by Crosswords Ltd. March 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
  9 5 1       7  
4     6         8
6       3   4    
9 7             3
      8   3      
5             4 7
    2   8       5
7         2     4
  5       6 1