Serious 3NT

Main articles: Contract bridge, Bidding system, Bridge convention, and Glossary of contract bridge terms

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.^[1]

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.

References

↑ Various articles in the American Contract Bridge League Bulletin (magazine). Convention cards submitted to the World Bridge Federation.

Contract bridge articles

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Publications and resources

Books	List of contract bridge books 25 Bridge Conventions You Should Know Bridge Squeezes Complete The Cardturner Design for Bidding Contract Bridge for Beginners Edwin Kantar bibliography Master Point Press Planning the Play of a Bridge Hand Terence Reese bibliography The Official Encyclopedia of Bridge Tickets to the Devil

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