Weekly Extreme Sudoku Competition for Dec 15 to Dec 21

Number 691, 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
    8   4   1    
      2   5   6  
2         9     3
  9       7      
      9 1 4      
      3     5 1  
4     8          
  1       6      
    6   5   2