Weekly Extreme Sudoku Competition for Jun 21 to Jun 27

Number 457, Extreme
by Crosswords Ltd. October 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
      8          
  3 4 6     9    
8       2   3   4
2           4   8
  4           2  
1   3           7
7   1   9       5
  6 9     7   4  
          6