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混和跳扣叫 or 2NT加叫?

#1 User is offline   zyp163 

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Posted 2012-December-11, 20:39

我最近在认真学习竞叫方面的内容。2NT就像个橡皮糠,到处存在。
现在它又来了:


持如下牌:
KJ54
Q3
AJ84
874
叫牌进程:
(1C)-1S-(X)-?
劳伦斯大师提供的新式武器是:2NT
我们用的是混和跳扣叫?


请教这个进程的渊源。
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#2 User is offline   gamebridge 

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Posted 2012-December-11, 22:31

我个人认为是点力。 现在开叫人和应叫人的点力至少是 (12+6=)18 点以上,按着3点一墩的理论,争叫方打2NT 需要(8×3=)24点。 推进人的2NT作为自然性质的2NT的可能性已经不大了。
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#3 User is offline   yin970902 

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Posted 2012-December-12, 01:29

2nt 加叫是四张将牌的限制性加叫或更好。
当知道了加叫的不同方式,就能选择出合适的叫品。
跳扣叫不合适,
简单扣叫2c 不合适,
2s加叫不合适,
3s跳加叫不合适。
上善若水,厚德载物
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#4 User is offline   lycier 

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Posted 2012-December-15, 00:44

此刻2nt是流行的通用约定,效果非常好,描述也很生动准确。
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