Weekly Extreme Jigsaw Sudoku Competition for Jan 13 to Jan 19

Number 643, Extreme
by Crosswords Ltd. January puzzle packs Now Out!. Thanks for supporting our site.

Design: Cross by Andrew Smith
All entries must be in by the end of Saturday, Jan 19 23:59 EST, USA

1 2 3 4 5 6 7 8 9
A
B
C
D
E
F
G
H
J
  6   4   1   2  
            5 4  
    1 2 4     5  
    4   1        
      6   3      
            3    
  4     3 7 1    
  1 3            
  9   1     4 3