Weekly Extreme Sudoku Competition for Jul 28 to Aug 3

Number 671, Extreme
by Crosswords Ltd. December 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       8        
  9   7       4  
    8       1 2  
  7 6   4       2
                 
5 2     3     6  
  4 7     5 6    
  8       4   7  
        9       3