Weekly Extreme Killer Sudoku Competition for Dec 1 to Dec 7

Number 689, Extreme
by Crosswords Ltd. September 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
23
 
 
18
 
15
5
 
7
 
10
19
 
 
 
21
 
 
 
 
 
 
14
 
 
12
 
25
 
 
 
 
 
15
 
17
12
 
8
18
 
 
 
13
 
 
 
 
20
 
 
 
 
 
12
 
8
22
 
22
 
18
 
8
 
 
 
8
 
 
 
18
 
17