Weekly Extreme Sudoku Competition for Jan 31 to Feb 6

Number 489, 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
          9 1    
2 3   5   7     6
        4       9
  9           3 1
5   3           7
4 7           6  
3       8        
7     9   6   8 4
    8 4