Weekly Extreme Sudoku Competition for May 26 to Jun 1

Number 662, Extreme
by Crosswords Ltd. July 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       3  
  5     9     4  
    7 1   8 5    
6   8         7 3
  1           2  
3 9         8    
    2 9     3    
  4     6     1  
          4