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Serious 3NT is a contract bridge bidding convention. It is used in game-forcing auctions where a major suit has been agreed upon. 1–2 if using 2/1 Game Forcing or 2–3 (Agreeing spades) The next bid indicates suitability for slam: * 3NT: strong (Serious 3NT) * 4/4/4: cuebid, but not strong (non-serious). * 4: truly minimum. Since Spades are the agreed trump suit, Three No Trump is not usually the best contract. Using Serious Three No Trump, a bid of Three No Trump says "I am Serious about slam", i.e. "I have a good hand". Bypassing bidding Three No Trump says "I am not Serious about Slam". Examples shown in the above auction. If one player bypasses 3NT with a Cuebid (and is 'not serious'), then a Cuebid by partner indicates that he is serious. Note that in the example auction above, if the strong hand is next (after the 3 bid, he can differentiate between a strong hand, a weak hand that has a control (in case partner is strong) or a minimum hand. Serious Three No Trump was devised by and named by Eric Rodwell.〔Various articles in the American Contract Bridge League Bulletin (magazine). Convention cards submitted to the World Bridge Federation.〕 ==Frivolous 3NT== Some partnerships reverse the meaning of 3NT in this situation. A weak hand bids 3NT to indicate no additional strength. This has the effect that a weak hand will not pinpoint a control for the defense. 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「Serious 3NT」の詳細全文を読む スポンサード リンク
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