顶底扣叫:Top and Bottom Cue Bid is designed to show the two suits of the cuebidder which are known to be the highest unbid suit and lowest unbid suit of the suit of the opener.
罗马跳叫:Roman Jump Overcall - The method of showing a two-suited hand by making a jump overcall, referring to the suit bid and the next higher suit (excluding the opener's suit).
罗马跳叫:Roman Jump Overcall - The method of showing a two-suited hand by making a jump overcall, referring to the suit bid and the next higher suit (excluding the opener's suit).
以下是对手分别开叫1c、1d、1H、 1S时应用顶底扣叫和罗马跳叫的情况:
1c后, 2c:d/s, 2d:d/h, 2h:h/s
1d后, 2d:c/s, 2h:h/s, 3c:c/h
1h后, 2h:c/s, 3c:c/d, 3d:d/s
1s后, 2s:c/h, 3c:c/d, 3d:d/h
上述方案的代价是损失了2阶高花和3阶低花阻击争叫, 这样的牌只能第二轮阻击(如果还有机会的话)。当然,同时跳叫2nt空出来了,可以代替做3阶低花阻击, 原理和3nt开叫低花阻击一样。这样的话, 只损失了2H和2S的高花二阶阻击争叫。
1c后, 2c:d/s, 2d:d/h, 2h:h/s
1d后, 2d:c/s, 2h:h/s, 3c:c/h
1h后, 2h:c/s, 3c:c/d, 3d:d/s
1s后, 2s:c/h, 3c:c/d, 3d:d/h
上述方案的代价是损失了2阶高花和3阶低花阻击争叫,
但是,由于2H/S阻击争叫的重要性,总体感觉这个方案得失不明。
为了不损失2H/S的跳争叫,进一步改正如下:
继续用Unusual 2nt和Michaels,只要约定对手1c开叫后, 跳争叫2d为d和S,1d开叫后,跳争叫3c为c和S即可。
这样就保留了2H/S的跳争叫的原意,只牺牲了2d和3c的跳争叫。
个人认为此方案利大弊小。得知推荐。
继续用Unusual 2nt和Michaels,只要约定对手1c开叫后,
这样就保留了2H/S的跳争叫的原意,只牺牲了2d和3c的跳争叫。
个人认为此方案利大弊小。得知推荐。
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