Weekly Extreme Sudoku Competition for May 12 to May 18

Number 660, Extreme
by Crosswords Ltd. February 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
                3
  9       7   1  
3         9 8   2
        9     8 5
    1       2    
8 6     2     7  
4   9 5   8     7
  3   4       6