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这个加倍是什么意思?

#1 User is offline   lycier 

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Posted 2016-July-26, 21:46

View PostPhil, on 2016-July-25, 13:07, said:

1N pass 2D 2S
Pass pass x

The expected spade length for x is closest to:

0-1
1-2
2-3
3-4
4-5



这道题比较有意思,我摘自BBO论坛,大意是:
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现在你期望加倍方有几张?大致是什么牌型?

0-1
1-2
2-3
3-4
4-5
-------------------------------------------------------------------------------------
0

#2 User is offline   muronghan 

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Posted 2016-July-26, 23:48

很好的题目。我相信多数人拿着45高套邀请实力,都是Stayman起步,所以我个人认为这个进程作为技术性加倍更为合理。最理想的牌型是2-5-3-3,开叫人若是4-2-(43)的牌型,惩罚2有可能得到最好的结果。加倍人应当至少有邀请的实力,是当开叫人低限且没有惩罚能力的时候,最起码可以改打2NT或3
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#3 User is offline   dvd 

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Posted 2016-July-27, 22:36

竞叫性x,s最有可能是1-2张;牌力足够继续叫牌;
x让同伴多一个选择罚放的机会,不愿意惩罚的话,有止可以叫2n,无止可以出自己的低花套或者支持同伴的h。
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#4 User is offline   lycier 

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Posted 2016-August-04, 02:12

View Postrmnka447, on 2016-July-25, 14:23, said:

I would think that this double is a balance of power double presumably showing shortness and at least 7-8 HCP.


Rmnka447说:我认为这个加倍是牌力平衡性加倍,大致上是短张,至少7-8hcp。
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我本人倾向性认同Rmnka447和Muronghan的理解,而且Muronghan说得更为具体细致。
非常幸运,最近观看美国Spingold决赛第一节时,看到一付类似的牌面,不知可否以为印证。


这个牌面的情形和Muronghan所言是一致的。

附:另室比赛牌面


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