Daily Killer Sudoku for Apr 20
Number 5871, Diabolical
by Andrew Stuart.
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
G
H
J
10
11
10
21
16
23
8
20
21
17
16
14
5
14
16
12
12
11
20
12
15
20
31
17
16
17