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New Minor Forcing (NMF), is a contract bridge bidding convention used to find a 5-3 or 4-4 major suit fit after a specific sequence of bids in which opener has rebid one notrump. The convention is triggered by responder at his second turn by an artificial bid of two in an unbid minor; it requires that he hold five cards in the major he has previously bid and an unlimited hand ranging in value from at least game invitational strength (11 or more points) to that sufficient to have interest in slam; he may also hold four cards in the other major. Accordingly, there are six bidding sequences in which the New Minor Forcing bid may be applied: Auction notes: 1. The opponents are silent throughout. 2. The ! indicates that the bid is . The New Minor Forcing bid by responder is forcing for one round and asks partner for further information on his shape and strength with the primary objectives of determining if opener has three-card support for responder's five-card major and/or if there is a 4-4 fit in hearts; other major suit fits are also investigated. In sequences 5 and 6, the NMF bid is made in the stronger minor suit. A jump by responder in an unbid minor after a 1NT rebid by opener is weak and to play. The bid of the new minor must be by opener. ==Responses and continuations== Methods differ on the priority and meaning of opener's response to the NMF asking bid. According to Seagram and Smith, the priority for responses by opener are: # to show an unbid four-card major. This can only be hearts. With a minimum 1NT hand (12 to a poor 13 HCP), bid the minimum 2; with a maximum 1NT hand (a good 13 or any 14 HCP), jump to 3. # to support partner's five-card spade suit if possible. With three cards and a minimum hand, bid spades at the two level; with three cards and a maximum, jump to the three level. # to show whether holding a minimum or maximum for one's 1NT bid and whether or not holding stoppers in the two unbid suits (the NMF suit is an unbid suit). There are five possibilities: ## with a minimum hand and stoppers in both unbid suits, bid 2NT. ## with a minimum hand and without stoppers in both unbid suits, rebid your first suit. ## with a maximum hand and stoppers in both unbid suits, bid 3NT. ## with a maximum hand and with a stopper in only one of the unbid suits, bid the suit in which you hold the stopper unless it is hearts; if it is hearts, jump bid in your first suit. ## with a maximum hand and without stoppers in either of the unbid suits, jump bid in your first suit. Others suggest that the first priority is to show three-card support for responder's major. Partnership agreement on this and other continuations is required. 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「New minor forcing」の詳細全文を読む スポンサード リンク
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