Weekly Extreme Sudoku Competition for Oct 15 to Oct 21

Number 578, 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
3 8       7      
    2   5        
7     2     1   4
2     7 8       6
  1           9  
5       9 2     1
9   3     5     8
        1   2    
      9       4 7