Weekly Extreme Sudoku Competition for Dec 20 to Dec 26

Number 744, 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
  4   5   9   2  
      4   7   8  
    5       6    
2         8     3
  5 8       2 1  
3     2         4
    3       9    
  9   7   4      
  8       2