Weekly Extreme Sudoku Competition for May 19 to May 25

Number 661, 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
  9             8
8     3       5 1
    5   2   4    
      8 7        
2 1   5       7 3
        3 2      
    7   5   6    
3 2       7     5
9             2