Weekly Extreme Sudoku Competition for Sep 4 to Sep 10

Number 520, 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
    8 5     6 9  
1 6 3       5 8  
7                
      6         4
3       9       8
6         2      
                5
  3 9       8 1 6
  1 7     4 3