Weekly Extreme Sudoku Competition for Dec 27 to Jan 2

Number 171, Extreme
by Crosswords Ltd. August 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     8         3
    8   9 3 1    
4   1            
      7 1   2    
7               8
    2   8 5      
            6   1
    6 3 5   4    
9         6     7