Weekly Extreme Sudoku Competition for Jul 7 to Jul 13

Number 668, Extreme
by Crosswords Ltd. May 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
      4 1   3    
  2   7   3   4  
  8              
          4   7  
3               5
  6   8   5      
              6  
  5 1 6   9   2  
6   9   4 7