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【每周一题】百慕大的3NT
[版面:桥牌][首篇作者:bucky] , 2015年10月05日19:06:57 ,1028次阅读,18次回复
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bucky
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发信人: bucky (bucky), 信区: Bridge
标  题: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Mon Oct  5 19:06:57 2015, 美东)

双有,队式淘汰赛,你左手开叫2NT(20-21点),右手3NT结束叫牌。
同伴首攻DA(一般显示有DK),明手摊下:
86
852
QJ8765
J7

你手持:
T542
AQT96
42
Q6

你们打正常信号。第一轮你出D4(希望告诉同伴你是双张方块),同伴转攻H7。你HA吃
进,庄家跟H4。你接着怎么出?
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Double500
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发信人: Double500 (Traveler), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Mon Oct  5 23:21:16 2015, 美东)

哈哈,看着应该回S。

但中国南家回了D2!
要不然的话,庄家later自己出Diamond的话,北家很可能没必要地duck一轮。
It  turns out北家多duck一轮是致命的,最后被投入,3nt成。


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josephine
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发信人: josephine (jo), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Mon Oct  5 23:43:00 2015, 美东)

If D2 is returned (which I believe is the correct play),  it is clear that
declarer only has two diamonds, so pd won't duck for sure... unless he
thinks CJ is an entry...but if CJ is an entry, declarer already has at least
2S 4C 1D 2H if D is ducked...

Looks like declarer is holding sth like:
AKQJ/KJx/xx/AK??

D return is needed to rid of declarer's exit card. 
pd can exit with S and let declarer play H/C himself.


【 在 Double500 (Traveler) 的大作中提到: 】
: 哈哈,看着应该回S。
: 但中国南家回了D2!
: 要不然的话,庄家later自己出Diamond的话,北家很可能没必要地duck一轮。
: It  turns out北家多duck一轮是致命的,最后被投入,3nt成。




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bucky
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发信人: bucky (bucky), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Tue Oct  6 01:51:17 2015, 美东)

If South thinks CJ could potentially be an entry, he would never return a
diamond. I think D2 pretty much forces partner to take DK, and be confident
that dummy is dead, and defend accordingly.

【 在 josephine (jo) 的大作中提到: 】
: If D2 is returned (which I believe is the correct play),  it is clear
: that declarer only has two diamonds, so pd won't duck for sure...
: unless he thinks CJ is an entry...but if CJ is an entry, declarer
: already has at least 2S 4C 1D 2H if D is ducked...
: Looks like declarer is holding sth like:
: AKQJ/KJx/xx/AK??
: D return is needed to rid of declarer's exit card. 
: pd can exit with S and let declarer play H/C himself.



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josephine
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发信人: josephine (jo), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Tue Oct  6 02:13:02 2015, 美东)

Who is South? you or pd?
You have CQ so you could not possibly think CJ would be an entry...


【 在 bucky (bucky) 的大作中提到: 】
: If South thinks CJ could potentially be an entry, he would never return a
: diamond. I think D2 pretty much forces partner to take DK, and be
confident
: that dummy is dead, and defend accordingly.



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bucky
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发信人: bucky (bucky), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Tue Oct  6 02:16:11 2015, 美东)

South is the hand with two small diamonds D42. The return of diamond
indicates passive defense, which implies holding at least one club honor
card.
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josephine
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发信人: josephine (jo), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Tue Oct  6 02:31:27 2015, 美东)

en, so that's pretty good defense ah


【 在 bucky (bucky) 的大作中提到: 】
: South is the hand with two small diamonds D42. The return of diamond
: indicates passive defense, which implies holding at least one club honor
: card.

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josephine
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发信人: josephine (jo), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Tue Oct  6 03:03:53 2015, 美东)

I don't think S return could be right.  declarer would of course clear S
before exiting with D.  pd would be thrown in even if he does not duck,
unless he has both CT and 9...


【 在 Double500 (Traveler) 的大作中提到: 】
: 哈哈,看着应该回S。
: 但中国南家回了D2!
: 要不然的话,庄家later自己出Diamond的话,北家很可能没必要地duck一轮。
: It  turns out北家多duck一轮是致命的,最后被投入,3nt成。

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Double500
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发信人: Double500 (Traveler), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Tue Oct  6 10:31:15 2015, 美东)

我的意思是"看着"应该return S, 但D return is correct.

【 在 josephine (jo) 的大作中提到: 】
: I don't think S return could be right.  declarer would of course clear S
: before exiting with D.  pd would be thrown in even if he does not duck,
: unless he has both CT and 9...



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zneteng
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发信人: zneteng (zneteng), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Tue Oct  6 16:04:52 2015, 美东)

S6
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bucky
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发信人: bucky (bucky), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Wed Oct  7 19:32:49 2015, 美东)

Thrown in 倒是不怕,同伴总可以梅花出手。主要问题是,假设回黑桃,庄家SA吃进,
立刻再出一张方块,就给同伴制造一个非常困难的猜测。如果庄家有三张方块,同伴必
须忍让,寄希望于庄家没有C10。百慕大另两桌上,美国一队和法国队庄家都是这个打
法,北家长考之后还是忍让,庄家明手DQ超过去再飞红心,轻松完成定约。忍让方块并
非完全不合理,但在这副牌上,不仅让庄家多拿了一墩方块,而且明手多了个进手飞牌。

中国队南家实战中打出了D2。乍一看有些奇怪,自己去动明手长套,但实际上把牌打清
了,既防止了同伴不必要的忍让,又明确了后续防守的方向,同伴不必顾虑明手的牌。
应该说是一个有创意的漂亮防守。

【 在 josephine (jo) 的大作中提到: 】
: I don't think S return could be right.  declarer would of course
: clear S before exiting with D.  pd would be thrown in even if he does
: not duck, unless he has both CT and 9...



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josephine
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发信人: josephine (jo), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Wed Oct  7 20:52:34 2015, 美东)

why 同伴总可以梅花出手?
What if declarer's clubs are sth like AK9x?

【 在 bucky (bucky) 的大作中提到: 】
: Thrown in 倒是不怕,同伴总可以梅花出手。主要问题是,假设回黑桃,庄家SA吃进,
: 立刻再出一张方块,就给同伴制造一个非常困难的猜测。如果庄家有三张方块,同伴必
: 须忍让,寄希望于庄家没有C10。百慕大另两桌上,美国一队和法国队庄家都是这个打
: 法,北家长考之后还是忍让,庄家明手DQ超过去再飞红心,轻松完成定约。忍让方块并
: 非完全不合理,但在这副牌上,不仅让庄家多拿了一墩方块,而且明手多了个进手飞
牌。
: 中国队南家实战中打出了D2。乍一看有些奇怪,自己去动明手长套,但实际上把牌打清
: 了,既防止了同伴不必要的忍让,又明确了后续防守的方向,同伴不必顾虑明手的牌。
: 应该说是一个有创意的漂亮防守。



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bucky
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发信人: bucky (bucky), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Wed Oct  7 21:07:33 2015, 美东)

First, declarer needs to guess which club to play. Second, declarer still
cannot get 9 tricks even after guessing right (4S, 1H, 3C).

【 在 josephine (jo) 的大作中提到: 】
: why 同伴总可以梅花出手?
: What if declarer's clubs are sth like AK9x?




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josephine
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发信人: josephine (jo), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Wed Oct  7 21:26:16 2015, 美东)

suppose he guesses right and plays 7, since 7 is larger than your 6,  his
diamonds are good. If you play Q, CJ becomes an entry~

【 在 bucky (bucky) 的大作中提到: 】
: First, declarer needs to guess which club to play. Second, declarer still
: cannot get 9 tricks even after guessing right (4S, 1H, 3C).



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bucky
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发信人: bucky (bucky), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Wed Oct  7 23:14:28 2015, 美东)

You mean, partner didn't lead C8?

【 在 josephine (jo) 的大作中提到: 】
: suppose he guesses right and plays 7, since 7 is larger than your 6,
: his diamonds are good. If you play Q, CJ becomes an entry~



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josephine
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发信人: josephine (jo), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Thu Oct  8 00:33:55 2015, 美东)

that's what i meant, and obviously i was wrong


【 在 bucky (bucky) 的大作中提到: 】
: You mean, partner didn't lead C8?

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bucky
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发信人: bucky (bucky), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Thu Oct  8 00:56:41 2015, 美东)

You were not wrong... So D2 return achieves several things, it cuts
communications to dummy, prevents partner from ducking DK, and prevents
partner from getting end-played (then making a defensive error such as a
small club card).

If this is true, then if you return a spade instead, maybe it is indeed
right for partner to duck DK? Partner will think: if South has another
diamond, he would play it instead of the spade, so partner likely have D
singleton? :-))

【 在 josephine (jo) 的大作中提到: 】
: that's what i meant, and obviously i was wrong



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josephine
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发信人: josephine (jo), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Fri Oct  9 10:58:08 2015, 美东)

And if he didn't duck, the pair should probably be investigated, because
that's not logical, and implies he somehow 'knew' D4 was not singleton~ :D

【 在 bucky (bucky) 的大作中提到: 】
: If this is true, then if you return a spade instead, maybe it is indeed
: right for partner to duck DK? Partner will think: if South has another
: diamond, he would play it instead of the spade, so partner likely have D
: singleton? :-))



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bucky
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发信人: bucky (bucky), 信区: Bridge
标  题: Re: 【每周一题】百慕大的3NT
发信站: BBS 未名空间站 (Fri Oct  9 16:50:20 2015, 美东)

No investigation needed, this is evidence of cheating. :-))

【 在 josephine (jo) 的大作中提到: 】
: And if he didn't duck, the pair should probably be investigated,
: because that's not logical, and implies he somehow 'knew' D4 was not
: singleton~ :D



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