Weekly Extreme Sudoku Competition for Feb 5 to Feb 11

Number 542, Extreme
by Crosswords Ltd. November 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
          3 9   1
        6     8  
4         1     2
  7         8   4
  6           1  
1   3         5  
6     7         5
  3     5     2  
    9 6 4