b****y 发帖数: 105 | 1 This is an interesting board played in 1970, France-USA
S:42
H:5
D:A832
C:KQT875
S:AQ53
H:KT97
D:KJ4
C:J2
N E S W
- - 1H -
2C - 2NT -
3NT - - =
leading: ST (mean KJTX(x) )
N E S W
S4 Sx SQ- ST
C5 C3 CJ- Hx
CK CA- C2 Hx
S2 S9 S3 Sx |
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g********d 发帖数: 89 | 2 For those who visit bridge columns, just forgot these watering posts
N KTx xx xx AQxxxx
W x AKxx KTxx KJTx E xxx JTxxx Jxxx x
S AQJxxx Qx AQx xx
Dealer: S
Vul: NS
bidding:
1S X XX 2H
P P 2s p
4s end
West cash HAK, shift to Club J:
What is your play?
Scoring: MP or IMP |
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f*****x 发帖数: 545 | 3 Is this double dummy? Hehe, better to rearrange it.【 在 gowithwind (小鬼) 的
大作中提到: 】
X XXX
AKxx KTxx KJTx E xxx JTxxx Jxxx x |
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g********d 发帖数: 89 | 4 Playing problem
N AJxx KJTx Jxx KQ
E xxx Axxxx 9875 2 W Qxxx xx KT JT643
S Kx Qx AQxx A9875
contract 6NT
lead dia 9, dummy low, west play T, you win Q
cash club KQ, east discard a heart on second club
what is your play? |
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C*****9 发帖数: 147 | 5 这个比较不合适,原本打法2的基本机会是西持CQ,兼顾的是西D4张加东持SK,不是东4
张D。
即使东S/C 4-4,还需要同时有SK和CQ,东持:
SKJxx (or KTxx KJTx) CQxx
时可以留成SKXxx Cxx,进手后穿一次C即可。
东持SKxxx CQxxx 或SKxx Cxxxxx而西CQx时挤压成立,但需要正确猜断,基本机会是东
4144并同时持有SK和CQ。
比较二种打法:
基本机会
打法1:西持D9
打法2:西持CQ
附加机会
打法1:东持SK、CQ,4144型
打法2:东持SK,西持D9
还是打法2机会大些。
事后看来,如果按空位原理,西持CQ机会不够大(5墩牌后,西空位6,东空位8),可以
直接飞东CQ(8/14=57%),飞中后将牌投入西。但飞不中就速宕。 |
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w****b 发帖数: 623 | 6 boreas分析得不错.这副牌对于防守的读牌,和防守信号是个很好的教材.
在(1)的局势时,应该拔HA.草花必然是通的--如果不通,定约总是要宕的--所以你红心无
论如何也吃不到两墩的.
在(2)的局势时,你应该续打第四张方块.
庄家没有高将吃第三张方块,清将,用草花垫红心,说明什么?其将牌肯定是有缺陷的.这
里有三种可能:KQxx,QJTx,KJTx.注意,你不必打他KJT9,和双张红心的机会.因为假如这
样的话,无论你如何防守,他都可以有合法的办法打成.
在这三种牌里,前两种,如果庄家是4-2-2-5牌型,你续打方块,那么你就以一种不可能的
方式把一个局防成了;如果是后一种,如果庄家是4-1-2-6,那么只有第四张方块才能提升
一副将牌.
纯粹是猜断吗?
不完全是,同伴在第三张方块下的垫牌,态度完全没有任何意义,所以只能是张数.你必须
假定他有三张黑心,他有两张方块,现在垫大草花,显示双张草花,你算算,他有几张红心?
所以唯一的机会是,同伴持将牌Q9x.你打第四张方块,如果庄家不将,同伴的9逼下明手的
A,提升Q;如果庄家用K将,同伴的Q9x坐JTx后总还能吃一墩;如果庄家用J将吃 |
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b****s 发帖数: 472 | 7 高。 将牌我分析的不够细, 只考虑了庄家KQxx的情况。 如果是QJTx或者KJTx的话,
第四墩回方片太妙了 |
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w****b 发帖数: 623 | 8 Let us say, you bid to 6S and need to make the contract on trump lead:
QT9
KJTx
KJ76
Jx
AK7xx
Ax
A8
A97x
Contract: 6S, lead: S2
you play 9 from dummy, which wins the trick. Plan the play from here.
If you play CJ from dummy, RHO plays Q, and if you allow it to win, he plays
a 2nd trump, which both follow. |
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w****b 发帖数: 623 | 9 4 hands are:
QT9
KJTx
KJ76
Jx
Jxx xx
xxx Qxxx
Txx Q9xx
T8xx KQx
AK7xx
Ax
A8
A97x |
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c****u 发帖数: 3277 | 10 It's actually hard to say. partner still may hold
something like Axxxx xx Ax xxxx, in which case,
you have to lead S to get the ruff immediately to beat 4H.
If your diamond holding is stronger, like:
KJTx, you may want to lead H here. Now your D holding is still
quite weak, so I'd just lead S anyway. club is actually a long shot,
you have to hold both of them hold at least two clubs and partner holds
CK or CA and dummy holds CK. From the bidding, west holds at least 5-4 in M,
east holds at least |
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t********e 发帖数: 90 | 11 第二副
S KJTxx
H AKQxx
D --
C J9x
S 5xx
H 9xx
D AKQxx
C xx
N-S Precision
1s p 2s x
4s pass
4S South
opening Lead HJ
CJ/Cx/Cx/CQ
S9/ST/SA/Sx
S8/Sx/Sx/ST
How to play?
S Tx
H AT97
D KJTx
C 963
S AQx
H J8
D Axx
C AQ872
1C 1S
1NT pass 2nt pass
3H pass 3nt pass
Opening Lead: Sx
Sx Sx SJ Sx
D9 DT Dx Dx
How to play ? |
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b***y 发帖数: 2804 | 12 赞!
假定CK在西家,并且基本排除5-1分布之后,这个打法可以成功的情况包括:
西家持 KJxx(3 cases)、KTxx(3 cases)以及 K876
共计7种情况。
从明手出小梅花,成功的情况有:
西家持 KJT、KJ8、KT8、KJ87、KT87、KJT8
共计6种情况
还有一条可能的路线:手里出梅花,如果西家出大牌(J或T)就忍让,出小牌就用9飞
过。成功的情况有:
西家持 KJT、KJTx(3 cases)
共计4种情况
另外还应该考虑到,在这个叫牌序列下,梅花4-2分布的概率要略大于3-3,因为如果西
家是4153的牌型,有可能会加叫到5D。也就是说西家持3张梅花的情况要稍加discount。
作为结论,手里先出CQ的打法要明显优于其它。 |
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p******e 发帖数: 1151 | 13 同伴如果一个进手都没有(低花没有Jxx之类的), 鬼子低花八个, 一个黑桃
在你有任何办法的时候已经定约回家了。 这种情况你出不出红桃没影响。
首先考虑不打红桃,你打什么:
黑桃首功估计不在考虑之列, KJTX的结构吃亏的可能很不小,加上加倍怎么都显示点
黑桃实力。
QX的方块应该不能考虑。 双张小牌的草花也几乎不能考虑---如果鬼子低花有些缺
陷, 首功低花都是帮忙的打法。
所以首功红桃几乎是必然选择。(当然, 首功红桃的也有一个问题,鬼子低花7墩在手
, 你送一个红桃, 加一个黑桃他回家了。但是这种情况,几乎没有成功的防守办法。)
这副牌而言,首功红桃什么定约都没希望了。攻红桃小和红桃Q各有利弊。 |
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i****e 发帖数: 642 | 14 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 |
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i****e 发帖数: 642 | 15 Okay, we all like to lead S. But Garozzo led H8. It looked great, since it
could beat the contract by 3 tricks. However it backfired, since partner did
not return S after winning HA. He returned a club, which could work well if
partner has Ax in clubs.
xx
KQ9x
KJTx
K9x
KJTxxx xxx
8xxx Ax
xx Axx
x QT8xx
AQ
JTx
Q8xx
AJxx
Kibs said it was a great lead, but I don't agree, even it was Garozzo :) |
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