Weekly Extreme Sudoku Competition for May 21 to May 27

Number 557, Extreme
by Crosswords Ltd. October 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
1 7           3 9
        1 5     6
    2 4          
3 4           6 5
                 
  6       4   8 7
          8 9    
2     3 9        
7             1