Weekly Extreme Sudoku Competition for May 17 to May 23

Number 139, Extreme
by Crosswords Ltd. November 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   8       9  
    2     5 7    
8 4     7        
        5     7  
3   8       5   9
  1     9        
        8     3 6
    4 5 6   9    
  8       9   1