Weekly Extreme Sudoku Competition for Nov 25 to Dec 1

Number 636, Extreme
by Crosswords Ltd. February 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
          1      
        9   5 2  
    2 4 5       1
  8         1   4
3 5           6 7
1   6 9       5  
4       6 3 2    
  6 7   1        
      5