Weekly Extreme Sudoku Competition for Sep 11 to Sep 17

Number 521, Extreme
by Crosswords Ltd. January 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         3      
  2 5   9   1 3 6
  9              
      6 1   4   2
  1           6  
2   7   8 4      
              5  
1   9   4   8 2  
      3         4