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对海洛约定叫中X的认识


yzdhy668

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opp开叫1NT争叫人加倍是惩罚性的:当对方是大NT时,加倍并不表示16-18均牌,而是

(1)要有一个坚实的长套花色,再加上一定的旁套花色上的实力;

(2)要有一个半坚实的长套花色,但要有足够的旁套花色进手张。

当对方是小NT时加倍,可用15点以上均型表示惩罚。

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