Weekly Extreme Sudoku Competition for Dec 17 to Dec 23

Number 900, Extreme
by Crosswords Ltd. April 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
        3       2
    3 1     7 6  
2     8   9     1
      7       8  
    6       9    
  4     5 1      
3     9         6
  8 7     5 2    
6       1