Weekly Extreme Killer Sudoku Competition for May 19 to May 25

Number 661, Extreme
by Crosswords Ltd. May puzzle packs Now Out!. Thanks for supporting our site.
All entries must be in by the end of Saturday, May 25 23:59 EST, USA

1 2 3 4 5 6 7 8 9
A
B
C
D
E
F
G
H
J
21
 
 
9
 
14
 
 
19
16
 
8
 
9
 
11
 
 
 
7
 
17
 
17
 
 
 
10
 
13
 
 
38
 
10
 
11
 
 
 
 
 
 
 
 
21
 
14
 
12
 
 
15
 
 
11
 
 
10
 
10
 
19
 
 
 
9
 
10
 
 
 
 
23
 
 
8
 
13
 
 

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