Weekly Extreme Sudoku Competition for May 14 to May 20

Number 556, 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
    2         3  
  7     1   5    
5     9   7      
7 8   4       9 3
        6        
3 1       9     6
      8   6      
    5   3     4  
  3         6