再来一个防守题

还是从坐庄题演变出来的：positive declarer play

You, west, holding
x
KQxx
xxxx
AKQT

after the bidding ----

W N E S
P 3S
x 4S 5H P
P 5S x (All Pass)

led club A towards the dummy:

T9x
A
AQx
J9xxxx

First round goes: club A, club 2, club 6, club 7.

What do you lead next?