Weekly Extreme Sudoku Competition for Oct 22 to Oct 28

Number 579, Extreme
by Crosswords Ltd. January 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   1    
  1   2   5   9 6
4               8
    1       8    
      3 6 9      
2   9       5    
6               2
  7       8   3  
    4   9