Weekly Extreme Sudoku Competition for May 15 to May 21

Number 817, Extreme
by Crosswords Ltd. December 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
      6   3   5  
4                
    3   5       1
    7       5 3  
1       8 9     7
  4 5            
3       7   2    
              4 3
  1   4   8