Weekly Extreme Sudoku Competition for Oct 14 to Oct 20

Number 630, 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
  5   2          
8       5   2   1
        6        
      3 2     7  
9 1           3  
  7     9 6 8    
        7     4  
7   4           3
          5   6