Weekly Extreme Sudoku Competition for Nov 27 to Dec 3

Number 845, 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
  2       8      
      6   2 9 3  
    4           5
  6     9        
  5   2   4   1  
        1     7  
3           8   1
  1 5 4          
      8       4