Weekly Extreme Sudoku Competition for Apr 30 to May 6

Number 554, 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
  5 2       1 6 9
      2   9      
        6     3  
4   9         2  
    5 8   4 9    
  7         8   6
  3     8        
      1   7      
1 2 7       6 8