----------------------------S A Q 8 5 3
----------------------------H K 7 6 4
----------------------------D A J 10
----------------------------C 6
S J 10 6 4-----------------------------------------------S 9
H Q J 2--------------------------------------------------H 5
D K Q 6--------------------------------------------------D 7 5 4 2
C 8 5 4--------------------------------------------------C K Q J 10 9 7 3
----------------------------S K 7 2
----------------------------H A 10 9 8 3
----------------------------D 9 8 3
----------------------------C A 2

East
4C Pass Pass Double
Pass 5H Pass 6H
Pass Pass Pass

Leading : DK

DA吃进,拔HA,K,发现西家有一张王牌赢墩.
现在不能举手投降,如果西家有4张黑桃,定约还是有希望.

出SK,注意东掉下了S9,
then S2, when west follow low spade, use S8 finesse.

注意:S 2-3 didn't help you, west must have 4 Spade

专家打出深飞是有逻辑推理的.