IMO,pass, To finish 4♥ Game Contract,need ♥A and ♣ K or♦A and ♥J and ♣K. Especially,north has only two spades.But,2♥ is not a constructive raise. Maybe north has a 4-hearts suit and a long ,bad diamond suit such as Jxxxx.
Pass is my idea.vulnerable is adverse to us after Opps' openning and responding. I cannot carry out a Game Contract but west can. IF LHO ♠Kxxxx ♥Kx ♦AJxx ♣Kx RHO ♠Axx ♥Jxx(x) ♦Qxx(X) ♣xxx as my competition,west can easily find any Honor(s) outside in my hand. At the same time,competion with a semi-balanced hands is dangerous.
[hv=pc=n&s=s8643hj7dak74cq74&d=n&v=b&b=13&a=1c1s]133|200[/hv] play 2/1,what is your choice?why? X 1NT Pass If notvulnerable VS notvulnerable,is your choice the same?
IMO,as you play 2♣ drury.maybe as this: Pass - 1♠ 1NT - 3♣ 4♣-- 4♠ 5♦ -- 5♥ 5♠-- 7♠ / 7NT When south bids 3♣,north has a very good hands.So a slam try is happyness. Cuebid 5♦,then 5♠, to make a grand slam try. South enjoys the invitation.
庄家已经有8墩牌,目的是寻找第9墩。还可以再丢2墩,我设计如下: 忍让h后,继续忍让第1轮d;吃住回出的任何红花色牌,如H,看西有无跟出,如果有H,接着兑现一次D,看东有无跟出;假设都有,那么先飞一次S,赢回回攻的红桃或者方块,然后兑现完每一门红花色牌的大牌,看有无33分布,都不是,兑现SAK,看s有无大牌跌出或者33分布,停在庄家手上。如果都没有,形成如下残局 S 8 H -- D -- C KJ10 ++++++ S -- H 3 D 5 C A2 ///////////////////情况1、假设西家持有 S J H 7 D -- C XX(不清楚是否含CQ) 此时东持有S--H--D7 CXXX(不清楚是否含CQ) 兑现CA,用方块把牌送到东家手上,明手扔掉S8,最后CQ被捉! ///////////////////情况2、假定是东家持有 S J H -- D 7 C XX(不清楚是否含CQ) 此时西家持有S-- H7 D-- CXXX(不清楚是否含CQ) 不兑现CA,送出H3,明手扔掉S8,东家受挤压,被迫扔掉C而不是D,西家吃进H后只有回c,完成定约!!