Weekly Extreme Sudoku Competition for Sep 15 to Sep 21

Number 678, 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
  5           2 9
      1 2 7 6    
                 
    1   9   7    
6 4     3       1
    8   5   2    
    2            
    9 8   4      
3 7           8