Weekly Extreme Sudoku Competition for Jan 7 to Jan 13

Number 590, 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
                1
9     7   8      
2 7         9 6  
  5 4 9          
      6 1        
          3 1 7  
  9 1 5       4 6
      8         2
3