Weekly Extreme Sudoku Competition for Mar 4 to Mar 10

Number 598, Extreme
by Crosswords Ltd. November 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     3          
  4       5      
    2   4 6 7    
  3 8       9    
1     5         8
    9       1 5  
    4 6 2   8    
      4       9  
      1   7     3