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Byzantine Blackwood is a bidding in the game of bridge. Devised by Jack Marx, it is a complex version of the (by which a four notrump (4NT) asks about 's holdings). Its premise is that both aces and kings may safely be shown in response to a Blackwood-type 4NT enquiry; provided that such kings are in well-defined ''key'' or ''half-key'' suits, there being no more than two such suits. The name was chosen to express the idea that Byzantine Blackwood is a development from Roman Blackwood, by analogy with the Byzantine Empire and the Roman Empire;〔Hugh Kelsey, ''Slam Bidding'', Faber & Faber, London, 1973, pp. 106-107, ISBN 0-571-10363-4〕 rather than that the convention is of Byzantine〔"excessively complicated and typically involving a lot of administrative detail"; Oxford Dictionary of English, 2nd edition, Oxford University Press, 2003, ISBN 0-19-861057-2〕 complexity. It seems to be little used nowadays (2014), most experts employing some form of . == Key suits == Key suits are defined as: * the trump suit, if one has been agreed upon either specifically or by inference, * a genuine side suit that has been bid and supported and * any suit bid by a player whose partner's first bid was in notrump. 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「Byzantine Blackwood convention」の詳細全文を読む スポンサード リンク
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