Weekly Extreme Sudoku Competition for May 28 to Jun 3

Number 871, 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
  7   6   4 1 2  
      7   5 6    
        3       4
                8
  8 2       9 7  
6                
3       1        
  4 8     6      
    5 2   7   4