Weekly Extreme Sudoku Competition for Feb 4 to Feb 10

Number 20, 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
  6 4       7 2  
2               3
9   5   7   4    
    3 9   7 1    
        5        
    6 4   8 3    
    7   9   5   1
1               2
  9 2       8 7