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These terms are used in contract bridge,〔Baron, 1993.〕〔Manley et al, 2011.〕 using duplicate or rubber scoring. Some of them are also used in whist, bid whist, the obsolete game auction bridge, and other trick-taking games. This glossary supplements the Glossary of card game terms. : ''In the following entries,'' boldface links ''are external to the glossary and'' plain links ''reference other glossary entries.'' ==0–9== ;0314, 3014, or 3014 RKCB: A mnemonic for the original (Roman) response structure to the Roman Key Card Blackwood convention. It represents "3 or 0" and "1 or 4", meaning that the lowest step response (5) to the 4NT key card asking bid shows responder has three or zero keycards and the next step (5) shows one or four. ;1430, or 1430 RKCB: A mnemonic for a variant response structure to the Roman Key Card Blackwood convention. It represents "1 or 4" and "3 or 0", meaning that the lowest step response (5) to the 4NT key card asking bid shows responder has one or four keycards and the next step (5) shows three or zero. ;1RF: One round force. ;2-under preempts: A 2 or 3-level conventional opening bid made two steps below the opener's suit: for example, 2 to show a weak two bid in spades or 3 to show a three-level preempt in hearts. If 2 is a strong, artificial force, 2 is natural. ;4SF: Fourth suit forcing. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Glossary of contract bridge terms」の詳細全文を読む スポンサード リンク
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