Double Dummy Problem

4s by South
Kh led
S J9432
H -
D A432
C 5432
S 108
H KQJ10987654
D -
C Q
N
W         E
S
S K7
H 2
D KQJ1098
C KJ109
S AQ65
H A3
D 765
C A876

Richard Collis sent us the double dummy problem opposite, which gave him some trouble. The contract is four spades, on the king of hearts lead. Look here for a solution.