Weekly Extreme Sudoku Competition for Jan 3 to Jan 9

Number 172, 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       7    
6 1           5  
  9   1          
9     4          
  3   5 8     6  
      6   3     9
  8       2   7  
  7           3 4
    1       2