j*******e
发帖数: 2168 | 1 记得有人（多半是bucky)贴过一副防守方underruff的牌，好像是为了隐藏牌情，
谁还记得具体是怎样一副牌吗？ | p******e
发帖数: 1151 | 2 maybe this example would work for you： it could happen when you need to
avoid a squeeze.
Txx
KJxx
xx
KJxx
x xxxx
T9x Qxx
KQJTxx xx
T9x Qxxx
AKQJx
Axx
Axx
Ax
You are East. South is declarer in small slam in spades after West preempts
in diamonds (and showing 0-7 points in your system, just for the sake of
this problem).
West leads the DK which declarer ducks and west continues with the diamond J
which declarer wins the A. At this point declarer has 11 tricks, and knows
you hold both the HQ and CQ.
Now declarer plays AK of trump, and then ruffs a diamond in dummy with the T.
At this point, you must now underruff! If you throw a heart, declarer can
draw trumps throwing 2 clubs and 1 heart from from dummy, play A, K of
hearts and drop your HQ, setting up the HJ.
If you throw a club, declarer can play AK of clubs, and ruff a club,
dropping your Q, with the HK as entry to the good CJ.
So you underruff with a trump. Now declarer can draw trumps, but since you
discard after dummy, you can just follow his discards and avoid being
squeezed. | b***y
发帖数: 2804 | 3 发信人: bucky (bucky), 信区: Bridge
标 题: Re: 【每周一题】真假挤牌
发信站: BBS 未名空间站 (Fri Apr 9 16:05:42 2010, 美东)
再看看这幅牌：
Ｑ５
ＡＫＪ
ＫＴ９４
８７５３
９７４
Ｔ６３
ＡＱＪ８
ＡＫＱ
定约为5D，叫牌过程：
Ｓ Ｗ Ｎ Ｅ
1NT 2S 3NT P
4D P 5D AP
说明一下，3NT表示有进局牌力但没有黑桃止张。
西家首攻ＳＡＫ，东家跟Ｓ８３。西家继续ＳＪ，你用明手Ｄ９将吃，东家跟吃Ｄ２！
你接下去怎么打？ | j*******e
发帖数: 2168 | 4 nice and clear example, thanks. I was writing something for a friend and
described several situations for underruff: 1) end-play/avoid end-play (e.g.
trump coup); 2) squeeze/anti-squeeze (just like your example). Then it
occurred to me it could also be used as a deceive play. I vaguely remembered
seeing a case here but could not remember the details. I mentioned it
anyway:)
【在 p******e 的大作中提到】
: maybe this example would work for you： it could happen when you need to
: avoid a squeeze.
: Txx
: KJxx
: xx
: KJxx
: x xxxx
: T9x Qxx
: KQJTxx xx
: T9x Qxxx
| j*******e
发帖数: 2168 | 5 Exactly what I am looking for, thanks!
【在 b***y 的大作中提到】
: 发信人: bucky (bucky), 信区: Bridge
: 标 题: Re: 【每周一题】真假挤牌
: 发信站: BBS 未名空间站 (Fri Apr 9 16:05:42 2010, 美东)
: 再看看这幅牌：
: Ｑ５
: ＡＫＪ
: ＫＴ９４
: ８７５３
: ９７４
: Ｔ６３
|
|
