Weekly Extreme Sudoku Competition for Dec 11 to Dec 17

Number 847, Extreme
by Crosswords Ltd. December 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
2       3 6     4
      9   8      
  1 3       8    
            5   6
4     1 2 3      
7   9            
    7       9 3  
      6   7      
1     3 8       2