Weekly Extreme Killer Sudoku Competition for Feb 1 to Feb 7

Number 437, Extreme
by Crosswords Ltd. February puzzle packs Now Out!. Thanks for supporting our site.
All entries must be in by the end of Saturday, Feb 7 23:59 EST, USA

1 2 3 4 5 6 7 8 9
A
B
C
D
E
F
G
H
J
20
17
 
 
19
10
8
 
 
 
 
 
 
 
 
7
 
20
11
3
11
16
10
 
10
12
 
 
 
 
 
21
 
 
 
 
16
 
 
 
 
18
12
 
 
15
8
3
 
 
 
17
14
9
 
 
 
10
 
 
 
 
 
 
14
 
9
15
 
21
 
 
19
 
 
 
 
10