p***r
发帖数: 20570 | 1 It is usually a matter of how good your system after 1/1 and 2/1 is. If you
can show both strength and shape information after 1/1 and 2/1 well, then
jacoby 2nt shouldn't be used for most hands when trump suit isn't your
longest suit. Still, for most players, their 2/1 and 1/1 can't allow them to
exchange shape and strength information conveniently. Therefore J2nt can
largely simplify the bidding and is prefered. In my system, j2nt is only bid
when the trump is the longest suit, so that would us... 阅读全帖 |
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v**********e
发帖数: 1295 | 2 关于持什么样的牌适合用Jacoby 2NT来答叫，四张支持是必须的，牌型呢？
按照设计者的最初想法，我理解大概是用来解决强均型应叫牌的，通过对开叫人牌型点
力的询问，来探索满贯。由于开叫人的牌型对叫牌前景至关重要，因此放弃应叫人自身
的描述而用类似接力的方式澄清开叫人的信息，这也符合平均型原理的基本思想。
不过不少专家也支持持非均牌的J2NT应叫，比如本月Bulletin上一副牌：
AK743
QJ82
-
AT63
面对同伴1H开叫，近半数专家选择用J2NT应叫。但这种处理方法还未必能称作主流，本
题的投票结果相当分散，2S/1S/4D也都有支持者。
这手牌对于4D或许显得太强了，空间也浪费掉了；1S没有建立逼局也没表示出支持，效
率也比较低，空间倒是省了，但被干扰的可能性增大；对于2S，这手牌有点弱套也不太
好。这样似乎2NT是最好的选择了。
但对于如下这手牌面对1H开叫，有可用的低花做2/1，你是否还会选择J2NT呢？
S AK95
H KQ84
D AJT72
C - |
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p*********6
发帖数: 679 | 3 If you bid 1S here, what would be your followup bid when the bidding goes 1H
-1S-1NT? It seems you would need a way to show gf (such as 2D checkback),
otherwise partner would not believe you have a gf hand with good H support -
a high price to pay for a could-be/unlikely 4-4 s fit game search. As you
said, j2nt definitely simplifies the bidding. You show gf and support (so-
called support with support) in one bid.
, |
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b***y
发帖数: 2804 | 4 这个牌选择用J2NT大概是数害相权取其轻。如果是黑桃梅花对换，肯定从2C起步了。其
实这手牌叫2S挺好啊，后续的叫牌可以轻易显示红心配合及短方块，整体特征应该可以
描述清楚了。 |
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n****i
发帖数: 109 | 5 我开叫1S, 同伴应叫2NT(J2NT),RHO争叫3D, 这时应该怎么处理?
我承认这个很少发生,但确实发生了... |
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b*d
发帖数: 75 | 6 多谢高手指点:-)
可以理解
这是什么派? 就是说搞的很西瑞尔思是不是? 是不是很麻烦跟精确制似的?
你的这个是不是J2NT? 我查了半天, Blow is copied from SAYC OKB-style simplified:
If responder jumps to 2NT over a 1H/1S opener, it is J2NT asking opener to
show a singleton or void. It shows 13+ points, good support for opener's suit
and is game forcing.
不过这里的点数算上牌型也不过是11点(或者有四张将牌支持可以算成12点?). 是不是这
个13+的要求也不时那么严格?
这个叫法显然是没有道理么, 什么年代的叫法?
恩,我完全同意这个观点,尤其对偶记不清约定算不清牌的,厚厚.
哈哈,果然是J2NT, 不过上面的是不是就不是拉?
还有你的叫法跟我上面的不太一样啊?
~~~~这个到底是什么意思,经常见
这个就有点 |
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b***y
发帖数: 2804 | 7 除非你有特别sophisticated的体系，一般来说从J2NT起步是正常的。当然可以构造出
一些８张将牌比９张将牌更加优越的牌例，但一般说来叫牌系统总是倾向于发掘最佳的
高花配合，因为特例毕竟是少数。如果对手有个体系可以叫到８张王牌配合的７Ｓ，而
９张配合的红心打不成大满贯，并且整场比赛我能做到只输这一副牌，我也认了。
如果是最原始的那种J2NT，同伴4H之后确实不好叫。问题是4H包含的太多的牌（低限无
单缺都只能叫4H)。固定搭档应该考虑在J2NT里加入一些改进的元素。 |
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b***y
发帖数: 2804 | 8 除非你有特别sophisticated的体系，一般来说从J2NT起步是正常的。当然可以构造出
一些８张将牌比９张将牌更加优越的牌例，但一般说来叫牌系统总是倾向于发掘最佳的
高花配合，因为特例毕竟是少数。如果对手有个体系可以叫到８张王牌配合的７Ｓ，而
９张配合的红心打不成大满贯，并且整场比赛我能做到只输这一副牌，我也认了。
如果是最原始的那种J2NT，同伴4H之后确实不好叫。问题是4H包含的太多的牌（低限无
单缺都只能叫4H)。固定搭档应该考虑在J2NT里加入一些改进的元素。 |
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p***r
发帖数: 20570 | 9 1S is good when you want to find something like:
KQxx KJxxx xx Kx from patner.
Here, if you bid J2NT, you'll unlikely find the top spot of 7S.
Still, if you are not very confident about the sequences after 1H-1S, you
should just bid J2NT...
at |
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i****e
发帖数: 642 | 10 It seems J2NT is the tool for almost everyone :)
If partner answers any shortness, it will be easy to explore grand. The real
case is that partner answers 4H. Then it seems it is the time to settle 6H.
1S response will provide potential way to figure out partner's shape.
1H 1S
2D 3C(?)
For a lot of partnership, 3C will be the only forcing bid after 2D, which
takes too much room, so may not be good for some hands. For this hand, no
matter what partner bid, 3D/3H/3S/3NT, you will have a hard t... 阅读全帖 |
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j*******e
发帖数: 2168 | 11 我想请教两个旁的问题：
1. J2NT之后，开叫人持5422是不是应该叫3NT而不是最低限的4H？
2. 应叫人如果5张S, 是不是反而应该用J2NT而不是1S回，因S多半更适合做边花？
real |
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p***r
发帖数: 20570 | 12 The standard version of J2NT is quite rough. Usually you can improve it with
some relay sequences.
With 5S, in theory it's still the best to start from 1S (although you will
have some difficulties later because some sequences after 1H 1S are no easy.
Ideally, you want to find all your 8+ card fit to decide whether you want
to bid a grand slam and which suit you want to play. There are always some
possibilities that you may play better in S or because you don't have the
adequate honors in S, you ... 阅读全帖 |
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p***r
发帖数: 20570 | 13 1S is good when you want to find something like:
KQxx KJxxx xx Kx from patner.
Here, if you bid J2NT, you'll unlikely find the top spot of 7S.
Still, if you are not very confident about the sequences after 1H-1S, you
should just bid J2NT...
at |
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i****e
发帖数: 642 | 14 It seems J2NT is the tool for almost everyone :)
If partner answers any shortness, it will be easy to explore grand. The real
case is that partner answers 4H. Then it seems it is the time to settle 6H.
1S response will provide potential way to figure out partner's shape.
1H 1S
2D 3C(?)
For a lot of partnership, 3C will be the only forcing bid after 2D, which
takes too much room, so may not be good for some hands. For this hand, no
matter what partner bid, 3D/3H/3S/3NT, you will have a hard t... 阅读全帖 |
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j*******e
发帖数: 2168 | 15 我想请教两个旁的问题：
1. J2NT之后，开叫人持5422是不是应该叫3NT而不是最低限的4H？
2. 应叫人如果5张S, 是不是反而应该用J2NT而不是1S回，因S多半更适合做边花？
real |
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p***r
发帖数: 20570 | 16 The standard version of J2NT is quite rough. Usually you can improve it with
some relay sequences.
With 5S, in theory it's still the best to start from 1S (although you will
have some difficulties later because some sequences after 1H 1S are no easy.
Ideally, you want to find all your 8+ card fit to decide whether you want
to bid a grand slam and which suit you want to play. There are always some
possibilities that you may play better in S or because you don't have the
adequate honors in S, you ... 阅读全帖 |
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b*d
发帖数: 75 | 17
some
~~~~~~~~~~~~~~~这个是什么意思? 可上可下?
field.
恩,好象是讲紫的,偶在yahoo上打,好想他们不用IMP, 偶觉的偶经常吃亏,好想是他们那里
,
每一单副牌叫到局不管什么用似的
这个东东偶查乐一下,是这样说的:
A jump to 3 of the other major shows a hand worth a raise to game with
singleton or void in side suit ... 好象这个比孔夫子的J2NT更象一些, 不过我从来
没听说过.
下面这些太长了,有都是E文, 偶的头都大了,还有好多词不认识:( 下周有空仔细研究
South's hand deserves
hand,
the
some
you
i.e,
the
others
kids. |
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c****n
发帖数: 21367 | 18 if in your system your 3S includes the hand you have,
your partner could not pass with all these, he/she should bid 4c
and let you decide whether 4S or not
however, usually 1S 3S is a limited raise which could be passed
hence your 3S may be a bid underbid
this slam is not easy to bid after 3S even you play it as GF.
you could start with J2NT or 2/1 GF... then the slam is reachable |
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v**********e
发帖数: 1295 | 19 同意5&6
低阶罚放牌不攻将十有八九会后悔的，只能攻将。
如果信任敌方的J2NT叫牌那就攻保守攻吧。这种进程下应叫人总归是有点的，开叫人没
准偷几个点，但总的说来这个局不像是摸上来的。 |
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v**********e
发帖数: 1295 | 20 checkback之后表达出高花支持的探贯牌还是有坑的，不过一般也只能表达三张支持。
1H
- |
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p***r
发帖数: 20570 | 21 Well, if you play two way checkback, you have two ways to show a gf H
support,
1H 1S
1N 3H
and
1H 1S
2D 2x
3H
1H
- |
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p*********6
发帖数: 679 | 22 (assuming 2/1) if 2h is the default rebid for a balanced minimum, then 4h;
if 2h shows 6+, then 3h... (side question: no j2nt for GF with 4+ support?) |
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v**********e
发帖数: 1295 | 23 With 4 A, J2NT is a good start to ask partner's shortness. If partner has
either C or D singleton and HK, grand is almost there.
at |
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v**********e
发帖数: 1295 | 24 With 4 A, J2NT is a good start to ask partner's shortness. If partner has
either C or D singleton and HK, grand is almost there.
at |
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i****e
发帖数: 642 | 25 J2NT tends to show balanced hand. I suppose that is the "standard". 4C was
not alerted. By the way, these are reasonable players, so I would expect
splinter should be part of their system.
If there is no 3H interference, 3C is short I suppose for most system. I
have no idea for 4C with or without interference. But peeking at the hand,
4C is not short :)
then |
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b***y
发帖数: 2804 | 26 其实这种情况经常发生。这个时候争叫3Ｄ相对是比较安全的，尤其是无对有，是个很
好的示攻机会。
我和同伴的约定，这个时候开叫方加倍就是显示方块单缺，其它新花色为扣叫，３Ｓ显
示额外将牌长度，均型低限牌可以ＰＡＳＳ。如果ＰＡＳＳ到应叫方，加倍为惩罚性，
因为开叫方已经表明了牌型牌力，应叫方可以作最终决定。 |
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a****s
发帖数: 524 | 27 开叫人：
加倍： 有A或K，非单缺。
新花色： 扣叫，并且方块单缺（逻辑结论）。
其他：描述性地强调满贯实力，但是没有方块控制。
pass：没啥好叫的。
pass到应叫人：
3NT：自然，软实力。
加倍：有K。
新花色： 扣叫，并且方块A（逻辑结论）。 |
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