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防守有将定约从A中低引


xhq

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防守有将定约的首攻,传统的规则严格禁止从A中低引。其背后的逻辑是,如果有人是单张 ,持A低引很可能损失一个赢墩。除此之外,如果庄家在这门花色上有大牌,低引可能让他便宜地吃到一墩。这条规则广泛适用,但例外情况在所难免。

最重要的例外情况是,敌方叫到满贯并且明手显示在一门花色有K,而你持有这门花色的A。低引将使庄家面临猜测而他多半会猜错。比如在下面这样一个叫牌进程中:

[hv=d=n&v=0&b=1&a=1dp1hp3hp3sp4dp5hp6hppp]133|100[/hv]

明手肯定有梅花第二轮控制,因为南家跳叫5要求北家有控制的情况下叫到满贯,而北家遵命而为。而且,北家肯定没有第一轮控制,因为他没有在3之后扣叫4.依据分析,西家应该在持双张、三张带A或者Q时首攻小。南家和北家的牌多半是这样:

[hv=pc=n&s=saqhqjt863dk4cj72&n=s83hak42daqj72ck9]133|200[/hv]

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