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Bridge版 - 【每周一题】创造选择
相关主题
【每周一题】基本原则desperate?
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【每周一题】标准防御3NT at BBO
Defend this 4S俱乐部实战防守
chances for the 3NT转载自《桥牌世界》10年1月防守题目
[转载] 刚才在yahooSpingold 防守讨论
实战首攻5,19 BBO自战评述(6)
相关话题的讨论汇总
话题: so话题: declarer话题: 庄家话题: h4话题: 同伴
进入Bridge版参与讨论
1 (共1页)
b***y
发帖数: 2804
1
IMP双无,左手方开叫1NT(12-14),右手方直接加叫到 3NT 结束叫牌。
你坐东家,同伴首攻H4(长四),明手和你的牌分别如下:
(北)
K Q 3
J 9 5
A Q J 8 3
Q J
(东)
8 6 5
10 8 2
10 6 4
A 8 6 2
第一墩,同伴H4,明手出H9,你H10,庄家手里跟H6。接下去你出哪张牌?
m****r
发帖数: 6639
2
我暂时找不到不出H的理由. 所以我出H8

【在 b***y 的大作中提到】
: IMP双无,左手方开叫1NT(12-14),右手方直接加叫到 3NT 结束叫牌。
: 你坐东家,同伴首攻H4(长四),明手和你的牌分别如下:
: (北)
: K Q 3
: J 9 5
: A Q J 8 3
: Q J
: (东)
: 8 6 5
: 10 8 2

i****e
发帖数: 642
3
At first glance, it seems that it doesn't matter what east does.
After studying the title of the post, we can give declarer the choice to set
up clubs, instead of the working diamond finesse.
So we return H2, telling declarer heart is 4-4. Declarer may hold something
like:
AJx(x)
A6
xx(x)
KTxx(x)
My answer seems too simple to be right :)
j*******e
发帖数: 2168
4
I do agree that declarer's H holding is probably A6 based on the first trick
; but why must H2 indicate H to be 4-4? H3 is still missing...

set
something

【在 i****e 的大作中提到】
: At first glance, it seems that it doesn't matter what east does.
: After studying the title of the post, we can give declarer the choice to set
: up clubs, instead of the working diamond finesse.
: So we return H2, telling declarer heart is 4-4. Declarer may hold something
: like:
: AJx(x)
: A6
: xx(x)
: KTxx(x)
: My answer seems too simple to be right :)

i****e
发帖数: 642
5
Yes, pd will need to hide H3 under HA. Still, declarer may think we are
fooling him, but we need to give him the choice.

trick

【在 j*******e 的大作中提到】
: I do agree that declarer's H holding is probably A6 based on the first trick
: ; but why must H2 indicate H to be 4-4? H3 is still missing...
:
: set
: something

p***r
发帖数: 20570
6
Good players tend to return the spot card to indicate the count. Therefore,
8 is based on 8x and 2 is usually based on xx2. So returned 8 often denies
three card holding in this layout. This play only works when declarer knows
your style of carding and is careful enough to play according to that. Still
, you lose nothing by playing that. So it is a sound play, which should work
for some times.
Also, it involves game theory. So the best strategy is to mix two plays up.
So you should play 2 for a certain amount of times and 8 for the rest to
avoid being outsmarted by declarers. Also, when you do hold DK and
originally 4 hearts, you should also mix the play.

trick

【在 j*******e 的大作中提到】
: I do agree that declarer's H holding is probably A6 based on the first trick
: ; but why must H2 indicate H to be 4-4? H3 is still missing...
:
: set
: something

b***y
发帖数: 2804
7
嗯,有道理。
再稍微说得详细一些。从第一轮的出牌,你希望同伴持有KQ带头的五张红心。从叫牌来
看,同伴其余花色最多还有一张K。如果同伴持有CK的话,庄家已有3墩黑桃,1墩红心
,5墩方块,击败定约毫无希望(梅花不可能拿通,否则庄家不会忍让第一墩)。所以
只能希望同伴有DK。但如果第二墩机械地回H8,庄家可以看出红心是5-3分布,将会通
过飞方块完成定约。比较好的是给庄家多一个选择,如果东家回H2,同伴又能机警地藏
起H3,庄家很可能会认为红心4-4分布,也许会认为此时出梅花是安全的。庄家持牌:
AJT7 / A6 / 952 / KT93
同理,如果DK在你手里,你红心是T832,应该考虑第二轮出H8,诱使庄家飞DK。不过这
种情况庄家可能会起疑心,因为同伴第二轮没跟出比H4更小的牌。但至少你尝试了让庄
家去猜,总有猜错的时候。
回头从庄家的角度来看。一般说来,如果没有好的理由,庄家倾向于相信防守方的基本
信号。原因在于,防守方经常不能 afford false-carding,需要通过正常信号来指导
防守。当然像本例中,经过分析,出假信号对于防守没什么损失,却可能误导庄家,但
总的来说这种情况不多见,更多的时候这些信息对于防守方更为重要。而且这种
falsecard往往需要防守双方的配合,比方这副牌东家出H2,西家必须懂得藏起H3,才
能以假乱真。
对于无伤大雅的牌张,好的防家采取随机出牌,或是中立的信号,不要有一个固定的
pattern。这也是为什么在顶尖牌手中没人使用o/e奇偶垫牌,因为你每张垫牌都必须表
示一个清晰的信号,而有些时候含糊的信号是最佳的。但是奇偶垫牌对于初中级牌手特
别有用,因为防守路线非常清晰,而且中初级的庄家经常不看防守方的信号。

【在 i****e 的大作中提到】
: Yes, pd will need to hide H3 under HA. Still, declarer may think we are
: fooling him, but we need to give him the choice.
:
: trick

b***y
发帖数: 2804
8
By the way, in real game there will be no title to guide your defense. :-))

【在 i****e 的大作中提到】
: At first glance, it seems that it doesn't matter what east does.
: After studying the title of the post, we can give declarer the choice to set
: up clubs, instead of the working diamond finesse.
: So we return H2, telling declarer heart is 4-4. Declarer may hold something
: like:
: AJx(x)
: A6
: xx(x)
: KTxx(x)
: My answer seems too simple to be right :)

p***r
发帖数: 20570
9
clear signals in long term KO teams (Also in long pairs events) have huge
advantages because they save a lot of energy for important hands.

【在 b***y 的大作中提到】
: 嗯,有道理。
: 再稍微说得详细一些。从第一轮的出牌,你希望同伴持有KQ带头的五张红心。从叫牌来
: 看,同伴其余花色最多还有一张K。如果同伴持有CK的话,庄家已有3墩黑桃,1墩红心
: ,5墩方块,击败定约毫无希望(梅花不可能拿通,否则庄家不会忍让第一墩)。所以
: 只能希望同伴有DK。但如果第二墩机械地回H8,庄家可以看出红心是5-3分布,将会通
: 过飞方块完成定约。比较好的是给庄家多一个选择,如果东家回H2,同伴又能机警地藏
: 起H3,庄家很可能会认为红心4-4分布,也许会认为此时出梅花是安全的。庄家持牌:
: AJT7 / A6 / 952 / KT93
: 同理,如果DK在你手里,你红心是T832,应该考虑第二轮出H8,诱使庄家飞DK。不过这
: 种情况庄家可能会起疑心,因为同伴第二轮没跟出比H4更小的牌。但至少你尝试了让庄

1 (共1页)
进入Bridge版参与讨论
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相关话题的讨论汇总
话题: so话题: declarer话题: 庄家话题: h4话题: 同伴