Weekly Extreme Sudoku Competition for Oct 16 to Oct 22

Number 526, 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
  7 4     5   3  
      8       2  
        9 1      
9         4     8
        6        
4   3 9         7
      2 4        
  6       7      
  4 2 3     7 1