Weekly Extreme Sudoku Competition for May 7 to May 13

Number 555, Extreme
by Crosswords Ltd. January 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 4     1        
2     5   8      
    8       2    
    3 6   7 8   1
1               9
    5 2   1 4    
    4       3    
      4   5     2
        6     7 4