Weekly Extreme Sudoku Competition for May 10 to May 16

Number 712, 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
            5 7 3
  7     9 2   6  
  4       5 9    
3       1        
  6 4       1    
        5       4
    7 2          
  2   1 3     9  
4 3 9