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In the game of bridge, Ghestem is a conventional overcall structure, using 2NT, 3, and the (non-jump) cuebid over an opposing opening at the one level to denote two-suited hands in two of the remaining three suits. This convention was devised by the French bridge and checkers player Pierre Ghestem. When playing Ghestem, after an opposing one-level opening, the three overcalls mentioned denote the three possible two-suited hands in the suits excluding the opened suit: :2NT : shows the two lowest-ranking unbid suits :3 : shows the two highest-ranking unbid suits :Cuebid : shows the top- and bottom-ranking unbid suits ==Requirements== The requirement for a Ghestem overcall is a two-suited hand with at least five cards in each suit and opening values. Point counts vary, but it is commonly agreed that a Ghestem bid is constructive and should be made on hands that hold the prospect of winning the auction. If made on very weak hands, there is the danger that if the opponents win the auction they will also have been warned about the distribution of the Ghestem bidder's hand. Given that the Ghestem overcalls are forcing, many partnerships apply no upper limit to the high card strength. 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「Ghestem」の詳細全文を読む スポンサード リンク
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