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这个加倍是什么意思?


lycier

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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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[hv=d=n&v=0&b=1&a=1np2d(%E8%BD%AC%E7%A7%BB%E8%87%B32H)2sppdp?]133|100[/hv]

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

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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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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。

 

[hv=http://www.bridgebase.com/tools/handviewer.html?sn=Welland&s=ST863HA54DQT7CK63&wn=Helgemo&w=SA5HQ9876D85CJ752&nn=Auken&n=SQ9742HKT2DK932C9&en=Helness&e=SKJHJ3DAJ64CAQT84&d=w&v=n&b=12&a=PP1NP2DP2HPP2SPPD!P3CPPP&p=C3C2C9CTD4DTD5D2S6SAS7SJC5&c=9]400|300[/hv]

这个牌面的情形和Muronghan所言是一致的。

 

附:另室比赛牌面

 

[hv=http://www.bridgebase.com/tools/handviewer.html?sn=Zimmermann&s=ST863HA54DQT7CK63&wn=Moss&w=SA5HQ9876D85CJ752&nn=Multon&n=SQ9742HKT2DK932C9&en=Grue&e=SKJHJ3DAJ64CAQT84&d=w&v=n&b=12&a=2H(weak%20weak%20two)PPP&p=C9CAC3C7HJH5H6HKD3D4DTD8D7D5DKDAH3H4HQH2C2D2CTCKC6CJHTC4&c=8]400|300[/hv]

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