Hi all,
The original NT range in CC Wei precision was 13-15 HCP, possibly because it would allow the simple rule of all 16+ HCP hands opening 1C.
There is a trend in the West to open 1NT with 14-16 HCP in Precision.
Here are a few reasons:
1. When 1NT is 13-15, NT ranges with 16 or more HCP must be stretched and are vulnerable to being lost in interference.
One possible ladder is:
1D-1M-1N = 11-12
1N = 13-15
1C-1D-1N = 16-19
2N = 20-21
Another is:
1D-1M-1N = 11-12
1N = 13-15
1C-1D-1N = 16-18
2N = 19-20
or even:
1D-1M-1N = 11-12
1N = 13-15
1C-1D-1N = 16-18
1C-1D-1H [H or BAL]-1S[forced]-1N = 19-21
2N = 22-23
In each case, the balanced hands that open 1C start at 16.
The problem with stretching the 1C-containing NT range is that when the opponent's compete, opener has a wider range of NT's to cover.
1C-(1H)-X-(2H) and opener may have 16 balanced or 19 balanced, for example.
Or opener may have an unbalanced hand. Opener is already at a disadvantage and this adds to it.
By playing a 14-16 NT, opener will always have 17+ if balanced, which provides more information in competition.
2. By removing 16 HCP balanced hands from 1C, it makes a random 8 HCP response a better promise of game.
Balanced hands have the least trick potential, versus unbalanced hands, on average. If there is no fit, a 16 HCP NT is a disappointment opposite 8 HCP.
By guaranteeing 17+ HCP if balanced, responding hands can upgrade to a positive response more often, which makes it easier to handle competition and get to the right contract.
It is more difficult to handle competition after a 1C-1D than after a 1C-suit positive.
e.g.
xx xxx AKxxx xxx
could gamble a game forcing 2D response to 1C a lot more easily if 1C promised 17+ HCP if balanced. This hand might be lost after 1C-(Pass)-1D-(2S).
Removing the balanced bad hands from 1C makes it easier to guarantee game with any 8 HCP.
The main advantage of 13-15 HCP is that it is more common than 14-16, and thus you can describe your hand more often more quickly with 13-15. However, there is no clear consensus that losing a 4-4 major fit (that you could find with a frequent 1D opening) is worth opening 1NT more often.
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〖美国大师讲座〗精确体系中的无将阶梯 which is best
#2
Posted 2013-November-06, 21:42
Dan, In several of my Precision partnerships I have played a 12-15 hcp 1NT. This is too wide a range, so we have gone back to 11-14 and open 1♦ with 15-16.
Ultra ♣ Relay: see Daniel's web page: https://bridgewithda...19/07/Ultra.pdf
C3: Copious Canape Club is still my favorite system. (Ultra upgraded, PM for notes)
Santa Fe Precision ♣ published 8/19. TOP3 published 11/20. Magic experiment (Science Modernized) with Lenzo. 2020: Jan Eric Larsson's Cottontail ♣. 2020. BFUN (Bridge For the UNbalanced) 2021: Weiss Simplified ♣ (Canape & Relay). 2022: Canary ♣ Modernized, 2023-4: KOK Canape.
C3: Copious Canape Club is still my favorite system. (Ultra upgraded, PM for notes)
Santa Fe Precision ♣ published 8/19. TOP3 published 11/20. Magic experiment (Science Modernized) with Lenzo. 2020: Jan Eric Larsson's Cottontail ♣. 2020. BFUN (Bridge For the UNbalanced) 2021: Weiss Simplified ♣ (Canape & Relay). 2022: Canary ♣ Modernized, 2023-4: KOK Canape.
#3
Posted 2013-November-07, 03:36
DJNeill, on 2013-November-06, 18:29, said:
Hi all,
The original NT range in CC Wei precision was 13-15 HCP, possibly because it would allow the simple rule of all 16+ HCP hands opening 1C.
There is a trend in the West to open 1NT with 14-16 HCP in Precision.
Here are a few reasons:
1. When 1NT is 13-15, NT ranges with 16 or more HCP must be stretched and are vulnerable to being lost in interference.
One possible ladder is:
1D-1M-1N = 11-12
1N = 13-15
1C-1D-1N = 16-19
2N = 20-21
Another is:
1D-1M-1N = 11-12
1N = 13-15
1C-1D-1N = 16-18
2N = 19-20
or even:
1D-1M-1N = 11-12
1N = 13-15
1C-1D-1N = 16-18
1C-1D-1H [H or BAL]-1S[forced]-1N = 19-21
2N = 22-23
In each case, the balanced hands that open 1C start at 16.
The problem with stretching the 1C-containing NT range is that when the opponent's compete, opener has a wider range of NT's to cover.
1C-(1H)-X-(2H) and opener may have 16 balanced or 19 balanced, for example.
Or opener may have an unbalanced hand. Opener is already at a disadvantage and this adds to it.
By playing a 14-16 NT, opener will always have 17+ if balanced, which provides more information in competition.
2. By removing 16 HCP balanced hands from 1C, it makes a random 8 HCP response a better promise of game.
Balanced hands have the least trick potential, versus unbalanced hands, on average. If there is no fit, a 16 HCP NT is a disappointment opposite 8 HCP.
By guaranteeing 17+ HCP if balanced, responding hands can upgrade to a positive response more often, which makes it easier to handle competition and get to the right contract.
It is more difficult to handle competition after a 1C-1D than after a 1C-suit positive.
e.g.
xx xxx AKxxx xxx
could gamble a game forcing 2D response to 1C a lot more easily if 1C promised 17+ HCP if balanced. This hand might be lost after 1C-(Pass)-1D-(2S).
Removing the balanced bad hands from 1C makes it easier to guarantee game with any 8 HCP.
The main advantage of 13-15 HCP is that it is more common than 14-16, and thus you can describe your hand more often more quickly with 13-15. However, there is no clear consensus that losing a 4-4 major fit (that you could find with a frequent 1D opening) is worth opening 1NT more often.
The original NT range in CC Wei precision was 13-15 HCP, possibly because it would allow the simple rule of all 16+ HCP hands opening 1C.
There is a trend in the West to open 1NT with 14-16 HCP in Precision.
Here are a few reasons:
1. When 1NT is 13-15, NT ranges with 16 or more HCP must be stretched and are vulnerable to being lost in interference.
One possible ladder is:
1D-1M-1N = 11-12
1N = 13-15
1C-1D-1N = 16-19
2N = 20-21
Another is:
1D-1M-1N = 11-12
1N = 13-15
1C-1D-1N = 16-18
2N = 19-20
or even:
1D-1M-1N = 11-12
1N = 13-15
1C-1D-1N = 16-18
1C-1D-1H [H or BAL]-1S[forced]-1N = 19-21
2N = 22-23
In each case, the balanced hands that open 1C start at 16.
The problem with stretching the 1C-containing NT range is that when the opponent's compete, opener has a wider range of NT's to cover.
1C-(1H)-X-(2H) and opener may have 16 balanced or 19 balanced, for example.
Or opener may have an unbalanced hand. Opener is already at a disadvantage and this adds to it.
By playing a 14-16 NT, opener will always have 17+ if balanced, which provides more information in competition.
2. By removing 16 HCP balanced hands from 1C, it makes a random 8 HCP response a better promise of game.
Balanced hands have the least trick potential, versus unbalanced hands, on average. If there is no fit, a 16 HCP NT is a disappointment opposite 8 HCP.
By guaranteeing 17+ HCP if balanced, responding hands can upgrade to a positive response more often, which makes it easier to handle competition and get to the right contract.
It is more difficult to handle competition after a 1C-1D than after a 1C-suit positive.
e.g.
xx xxx AKxxx xxx
could gamble a game forcing 2D response to 1C a lot more easily if 1C promised 17+ HCP if balanced. This hand might be lost after 1C-(Pass)-1D-(2S).
Removing the balanced bad hands from 1C makes it easier to guarantee game with any 8 HCP.
The main advantage of 13-15 HCP is that it is more common than 14-16, and thus you can describe your hand more often more quickly with 13-15. However, there is no clear consensus that losing a 4-4 major fit (that you could find with a frequent 1D opening) is worth opening 1NT more often.
首先我们真诚地感谢美国桥牌专家Dan Neill大师,全文如下:
精 确 体 系 中 的 无 将 阶 梯
大家好:
原始的魏氏精确体系的无将阶梯是13-15hcp,可能是因为该体系允许使用简单的开叫规则:16hcp+开叫1♣。
但在西方欧美国家里,精确体系倾向于1NT是14-16hcp。
原因如下:
1- 当1nt=13-15hcp时,16p或16p以上的无将阶梯肯定会被扩大,在受干扰的情况下,很容易遭受损失。
那么,一种可能的阶梯是:
1♦-1M-1N = 11-12
1N = 13-15
1♣-1♦-1N = 16-19
2N = 20-21
而另一种无将阶梯是:
1♦-1M-1N = 11-12
1N = 13-15
1♣-1♦-1N = 16-18
2N = 19-20
甚或阶梯是:
1♦-1M-1N = 11-12
1N = 13-15
1♣-1♦-1N = 16-18
1♣-1♦
1♥-1♠
1N = 19-21
(1♥* =H套或均型,逼叫至1♠
1♠*=接力)
2N = 22-23hcp
在这些牌例中,均型牌面开叫1c的起始点是16P。
这种被扩大的1♣的无将问题是:当处于对手争叫的进程下,开叫人的强无将阶梯范围过宽会被掩盖。
比如:
开叫人可能是16p均型,也可能是19P均型,或者也可能是一手非均型。这样就使得本已处于不利的情况下的开叫人愈加不利。
而打14-16p阶梯的无将,如果是均型,开叫1♣将承诺永远有17p+。在竟叫过程中这就为同伴提供了更多的信息。
2- 从1♣开叫定义中去除16p均型, 就使得任意8hcp应叫都是更好的进局承诺。通常而言,相对于非均型,均型的牌面至少有赢墩的潜力。如果没有花色配合,那么一个16hcp的无将面对着同伴的
8hcp仍是一个令人沮丧的定约。
如果均型而能承诺17P+,经常会获得更多的积极应叫,使得在竟叫过程中处理的更加容易,并且获得正确的定约。
和1♣-同伴积极应叫花色相比,在竟叫过程中,1♣--1♦后更难处理。
例如:应叫人持有
♠:xx
♥:xxx
♦:AKxxx
♣:xxx
如果1♣开叫承诺均型时17hcp+,那这牌赌博性应叫2♦逼局就会容易得多。
而不至于象在下面这样的 叫牌进程中,很可能的丢局。
从1♣开叫定义中去除均型坏牌,更容易保证任意8hcp进局。
13-15hcp的主要优点是比14-16hcp更常见,如此一来当你持有13-15hcp时可以更频繁更迅速地描述了。
但是,相比错过一门高花4-4配合(开叫1♦,你会经常性地发现高花配合),13-15p是否是更值得更频繁地开叫1nt没有明确共识。
Dan
#6
Posted 2013-November-07, 04:43
jq的13-15的1n,的确存在一些问题;就开叫来讲,选择大nt还是小nt,就个人的认可度而言:可变大小nt>小nt>大nt;
Fantuns体系采用小nt,用作者的原话来讲,根据他的统计,小nt因为被x而造成的损失可以忽略不计,小nt带来的利远大于弊。
对打jq体系的牌手来讲,条件允许的话,这个NT阶梯的确值得改良。
Fantuns体系采用小nt,用作者的原话来讲,根据他的统计,小nt因为被x而造成的损失可以忽略不计,小nt带来的利远大于弊。
对打jq体系的牌手来讲,条件允许的话,这个NT阶梯的确值得改良。
#7
Posted 2013-November-07, 11:57
作为译者,我曾多年就浏览他的网站,正是他的网站的专业性深深吸引了我的心,我非常敬佩他,以至于翻译时我能听到dan大师的心声!
意译和直译相辅,怕功底不深的读者误会,我减少了一些意译,他也尊重我的意见,措辞柔和而精炼。限于中国读者的心理承受和知识面,许多话大师是保留的,我敢负责说。而dan大师的牌技,我难望项背,不愧是美国著名的桥牌专家和教练,红丝带获得者。我关注留意和研究这位美国专家多年了,不曾想大师竟然爽快地履约了,让我激动不已。
略表数言,以示敬意!
意译和直译相辅,怕功底不深的读者误会,我减少了一些意译,他也尊重我的意见,措辞柔和而精炼。限于中国读者的心理承受和知识面,许多话大师是保留的,我敢负责说。而dan大师的牌技,我难望项背,不愧是美国著名的桥牌专家和教练,红丝带获得者。我关注留意和研究这位美国专家多年了,不曾想大师竟然爽快地履约了,让我激动不已。
略表数言,以示敬意!
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