Weekly Extreme Sudoku Competition for Jun 5 to Jun 11

Number 820, 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
    9     8   4  
8       1        
7     2   9      
    1     6 5 2  
9               6
  5 8 4     9    
      6   4     3
1       7       4
  6   9     7