Weekly Extreme Sudoku Competition for Oct 6 to Oct 12

Number 681, 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
      6   1     9
7     8     4 5 1
                 
6     7   3 8    
  7           4  
    2     9     6
                 
5 2 3 1   8     7
1     3   6