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2♣强开叫后的Forsen约定叫

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发表于 2021-4-3 13:13:41 | 显示全部楼层 |阅读模式
本帖最后由 itopia 于 2021-4-3 20:14 编辑

偶然发现MARK HORTON 2000年出版的《Simple Conventions》一书中介绍了一个不那么simple的约定叫:Forsen,个人感觉还是挺有特色的,网上搜寻没有找到相关资料,不知实际应用中效果如何,为保持愿意呈现,现贴出原文来看看是否有所启发?

Forsen

When I accepted the commission to write this book I decided that if possible I would try to include something new. Not so easy when one considers the huge number of conventions that already exist. Then I got the idea of introducing you to Forsen, a convention that I have created using the names of two of Great Britain’s best players, Tony Forrester and Brian Senior.

Tony is well known in the United States, having been a runner-up in the 1991 Bermuda Bowl and a recent winner of the prestigious Reisinger Trophy. Brian has established a reputation as one of the best writers of his generation. He has represented Ireland, England, and Great Britain, and is the Editor of International Popular Bridge Monthly.

Tony and Brian worked independently on improving the responses to an opening bid of Two Clubs. What I have done is to try to amalgamate the best of their ideas into one - the Forsen convention.

When a player has a hand strong enough to open 2 a significant number of the high cards in the pack have usually been accounted for. If you assume the strong hand has around 24-25 points then only 15-16 are left for the remaining three players. On average each of them will hold around 5 or 6 points. The key idea of this convention is to enable the responder to get the strength of his hand over quickly, hereby enabling the opener to make an accurate evaluation of the partnership’s assets at an early stage. It also does away with the necessity of a second negative.

These are the basic responses to a 2 opening bid:
2 7+ points, any shape
2 0-3 points
2 4-7 points or 12+ balanced
2NT 5-7 points, a good club suit
3 5-7, a good diamond suit
3 5-7, a good heart suit
3 5-7, a good spade suit
3NT any solid suit
4 a one-loser diamond suit (6+ cards)
4 a one-loser heart suit (6+ cards)
4 a one-loser spade suit (6+ cards)
4 a one-loser club suit (6+ cards)
4NT Blackwood


A good suit is defined as at least KQxxx.

After a response of 2 the opener can rebid naturally or agree with a partner to be scientific, using a bid of 2 as a relay, allowing the responder to describe his hand.

牌例略。



楼主热帖
发表于 2021-4-3 18:29:02 | 显示全部楼层
学习了,逻辑性很好,看着感觉挺好用!谢谢分享。
发表于 2021-4-4 08:00:24 | 显示全部楼层
感谢楼主的分享
发表于 2021-8-16 02:20:42 | 显示全部楼层

感谢楼主的分享
发表于 2021-8-17 12:46:37 | 显示全部楼层

感谢楼主的分享,学习了
发表于 2021-9-1 10:37:59 | 显示全部楼层
挺有用的,谢谢分享。
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