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【每周一题】高阶防守
[版面:桥牌][首篇作者:bucky] , 2015年09月03日03:57:19 ,268次阅读,10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】高阶防守
发信站: BBS 未名空间站 (Thu Sep  3 03:57:19 2015, 美东)

IMP无对有,你坐南拿到:T5 / 95 / QT73 / AK763
右手方开叫1H,你PASS,全部叫牌过程为:
E   S   W   N
1H   P  3H   X
4H  5C   P   P
5H  AP
3H = 混合加叫
你其实有加倍5H的冲动。但是你了解同伴的风格,在有利局况下叫牌可能相当激进,他
的加倍未必有很强的实力。你的5C已经表达了你的牌,所以你把决定权留给同伴,最终
防守未加倍的5H。

你首攻拔CK,明手摊下:
873
KT432
A6
J52

你的持牌:
          T5
          95
          QT73
          AK763

同伴首轮跟C8,庄家C4。你如何继续?

--
※ 修改:·bucky 於 Sep  4 14:56:22 2015 修改本文·[FROM: 207.]
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imlate
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发信人: imlate (toolate), 信区: Bridge
标  题: Re: 【每周一题】高阶防守
发信站: BBS 未名空间站 (Thu Sep  3 12:23:09 2015, 美东)

C8 is the lowest club. Is this standard signal? Then a D switch may be
needed in case declarer has 4522 shape with CQ but without DK.

If C8 is encouraging, I will simply continue CA.
--
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bucky
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发信人: bucky (bucky), 信区: Bridge
标  题: Re: 【每周一题】高阶防守
发信站: BBS 未名空间站 (Thu Sep  3 14:59:05 2015, 美东)

I think the defense plays UDCA. But how likely does declarer have second
club?

【 在 imlate (toolate) 的大作中提到: 】
: C8 is the lowest club. Is this standard signal? Then a D switch may be
: needed in case declarer has 4522 shape with CQ but without DK.
: If C8 is encouraging, I will simply continue CA.



--
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imlate
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发信人: imlate (toolate), 信区: Bridge
标  题: Re: 【每周一题】高阶防守
发信站: BBS 未名空间站 (Thu Sep  3 15:50:36 2015, 美东)

It is unlikely from the bidding, but that seems to be the case to concern.
Otherwise, simply continue C and let declarer play it. That is especially
the case at the table. But since I am not at the table, so I guess I am
wrong :)

【 在 bucky (bucky) 的大作中提到: 】
: I think the defense plays UDCA. But how likely does declarer have second
: club?



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bucky
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发信人: bucky (bucky), 信区: Bridge
标  题: Re: 【每周一题】高阶防守
发信站: BBS 未名空间站 (Thu Sep  3 19:50:46 2015, 美东)

OK, think in this way: if I don't switch, is it possible that declarer can
set up a suit to pitch some losers (and which suit would it be)? On the
other hand, even if declarer has second club, can club loser disappear?

【 在 imlate (toolate) 的大作中提到: 】
: It is unlikely from the bidding, but that seems to be the case to
: concern. Otherwise, simply continue C and let declarer play it. That is
: especially the case at the table. But since I am not at the table, so I
: guess I am wrong :)




--
※ 修改:·bucky 於 Sep  3 19:51:24 2015 修改本文·[FROM: 207.]
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josephine
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发信人: josephine (jo), 信区: Bridge
标  题: Re: 【每周一题】高阶防守
发信站: BBS 未名空间站 (Thu Sep  3 21:36:55 2015, 美东)

Noticing that pd coughed 3 times, I quickly switched to a D

【 在 bucky (bucky) 的大作中提到: 】
: IMP无对有,你坐南拿到:T5 / 95 / QT73 / AK763
: 右手方开叫1H,你PASS,全部叫牌过程为:
:  E   S   W   N
: 1H   P  3H   X
: 4H  5C   P   P
: 5H  AP
: 3H = 混合加叫
: 你其实有加倍5H的冲动。但是你了解同伴的风格,在有利局况下叫牌可能相当激进,他
: 的加倍未必有很强的实力。你的5C已经表达了你的牌,所以你把决定权留给同伴,最终
: 防守未加倍的5H。
: ...................



--
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imlate
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发信人: imlate (toolate), 信区: Bridge
标  题: Re: 【每周一题】高阶防守
发信站: BBS 未名空间站 (Thu Sep  3 21:55:20 2015, 美东)

Continuing club is passive defense.

Switching D (even without cough:) should be reasonable. It only fails if
declarer holds
Kxxx
AQJxx
KJx
x
which is less likely given pd's double with less HCPs and declarer's 5H bid.

Something like following is more likely, which requires D switch:
KJTx
AQJxxx
xx
x

【 在 bucky (bucky) 的大作中提到: 】
: OK, think in this way: if I don't switch, is it possible that declarer can
: set up a suit to pitch some losers (and which suit would it be)? On the
: other hand, even if declarer has second club, can club loser disappear?



--
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josephine
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发信人: josephine (jo), 信区: Bridge
标  题: Re: 【每周一题】高阶防守
发信站: BBS 未名空间站 (Thu Sep  3 22:57:44 2015, 美东)

Without cough, D might be a bad choice:)
Like you said, it fails when declarer holds Kxxx/AQJxx/KJx/x, or Axxx/AQJxx/
KJx/x

D works with the cough, though, when declarer holds:
AQJ/AQJxxx/xx/Qx,
or,
KJ9x/AQJxxx/xx/x


【 在 imlate (toolate) 的大作中提到: 】
: Continuing club is passive defense.
: Switching D (even without cough:) should be reasonable. It only fails if
: declarer holds
: Kxxx
: AQJxx
: KJx
: x
: which is less likely given pd's double with less HCPs and declarer's 5H
bid.
: Something like following is more likely, which requires D switch:
: KJTx
: ...................






--
※ 修改:·josephine 於 Sep  3 23:12:07 2015 修改本文·[FROM: 24.]
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bucky
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发信人: bucky (bucky), 信区: Bridge
标  题: Re: 【每周一题】高阶防守
发信站: BBS 未名空间站 (Fri Sep  4 00:01:59 2015, 美东)

Well, you have S10, so declarer cannot have it...

【 在 imlate (toolate) 的大作中提到: 】
: Something like following is more likely, which requires D switch:
: KJTx
: AQJxxx
: xx
: x
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imlate
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发信人: imlate (toolate), 信区: Bridge
标  题: Re: 【每周一题】高阶防守
发信站: BBS 未名空间站 (Fri Sep  4 12:23:38 2015, 美东)

Oh, then the chance to discard D on S is even slim.

I blame on you to put STx on the same line as text :)

【 在 bucky (bucky) 的大作中提到: 】
: Well, you have S10, so declarer cannot have it...



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bucky
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发信人: bucky (bucky), 信区: Bridge
标  题: Re: 【每周一题】高阶防守
发信站: BBS 未名空间站 (Fri Sep  4 14:56:49 2015, 美东)

Fixed the alignment in the OP.

【 在 imlate (toolate) 的大作中提到: 】
: Oh, then the chance to discard D on S is even slim.
: I blame on you to put STx on the same line as text :)



--
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