Weekly Extreme Sudoku Competition for Jul 3 to Jul 9

Number 511, 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
    9   1   3    
    2 3   6      
                5
  6         8   9
  5   7          
4     2       6  
1       2        
      6   1 7    
    7   9   6