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・ Five Ws
・ Five Year Forward View
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・ Five Years Gone
・ Five Years in the Life
・ Five Years Later
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Five-card majors
・ Five-card stud
・ Five-cent coin
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・ Five-Company Agreement
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・ Five-fret stretch
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Five-card majors : ウィキペディア英語版
Five-card majors
Five-card majors is a contract bridge bidding treatment common to many modern bidding systems. Its basic tenet is that an opening bid of one-of-a-major in first and second position guarantees at least five cards in that major. This method has become standard in North American tournament play, but European methods vary.〔Manley et al (2011), page 348.〕 〔Petkov (2005), page 31.〕
==The concept==
Typically when a bridge player makes a natural bid in a major suit (hearts or spades), he is promising at least four cards in that suit and asking partner if it will be an advantageous trump suit for the partnership. Because of the power of naming a trump suit with an eight-card fit, the responder with four or more cards of that suit will support his partners bid as if to say "we have found our eight-card fit."
If the opening bid promises five cards in the suit rather than just four, and responder holds three-card support, the 5-3 fit will be found immediately, rather than after opener's rebid. A 5-4 fit will also be found immediately, although a 4-4 fit will be found only after partner's first response. Since finding major suit fits is a high priority, making opening bids of 1 and 1 promise five cards rather than four is attractive.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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