Give our Suit Bid Flashcards a try for free.A bid of 3H by you would be a jumpshift, so 4H is a splinter showing you have Spade support and a singleton or void in Hearts.This is usually very important information to relay in trying to reach slam.Different bidding systems may specify different strengths for responders hand, e.g. 10-12 high card points (HCP), 10-14 or 11-15, for a splinter.
This response is considered to be forcing to game in the suit of the opening bid. If the partnership plays splinter bids, the Jacoby 2NT response tends to deny the shape for a splinter (i.e., no singleton or void). However, it might be the best alternative as prelude to possible slam exploration with unbalanced support in a holding stronger than the agreed range for a splinter bid. Thus, the 21 system requires a bidding mechanism to describe responder hands that have in-between values: those holdings in the 10-12 point range. Recall that using Standard American bidding, responder could make a two over one bid showing invitational values not so with the 21 system. Openers Rebids Over a Jacoby 2NT Response Openers Rebids Over a Jacoby 2NT Response edit With a balanced hand, opener rebids as follows: 2 With 16 or more HCP opener rebids three of the agreed suit. With an unbalanced hand, there are two common methods of continuing rebidding over a Jacoby 2NT response, the choice of which is a matter of agreement between the partners. These methods differ only in the definition of a bid of another suit. Method One edit The earlier method uses the following bids. With a void in spades or a singleton in any suit, the opening bidder cue bids three of the short suit. With a void in hearts, diamonds, or clubs, the opening bidder cue bids four of the void suit. Note that the opening bidder must cue bid 3 rather than 4 with a void in the spade suit so a Jacoby 2NT responder who judges that slam is not in the cards can sign off at 4.) Method Two edit The newer method uses the following bids. With another good five card suit, the opener bids four of the second suit. With a singleton or void in the absence of another good five card suit, the opening bidder cue bids three of the short suit. Rebids by the Jacoby 2NT Responder edit The Jacoby 2NT bidder must assess how the hands fit, and generally will have the following options. The Jacoby 2NT bidder may sign off in four of the openers major (or pass, if the opener has already bid four of the opening major). The Jacoby 2NT may use cue bids andor slam conventions to find the best contract if the bidding suggests a possibility of a slam. Variants edit The 2NT bid is used in some systems to show an invitational or better raise (10 point upwards, at least four-card support, forcing to the three level only) rather than a game force. In 21 game forcing and Acol, this is used if opponents double and is called the Jordan 2NT convention in the USA; in the UK, it is sometimes called Truscott. Some books and articles, particularly in the UK, call this Jacoby 2NT, but this is technically incorrect. It can also be used in a four-card major system such as Acol, but it may then be useful to change openers rebids to allow him to specifically show a hand with only a four-card major, typically by using 3NT. Also, the three and four-level new suit rebids may be swapped so that a three-level bid shows a long suit and a four-level bid a shortage (splinter bid). In some forms of Acol, a 3NT response is used instead of 2NT to show a hand with 13-15 points, four-card support and no side suit shortage (a pudding raise). The 2NT response may also be used as a pudding raise, giving opener more options to show his hand shape and strength if interested in slam. References edit Manley, Brent, Editor; Horton, Mark, Co-Editor; Greenberg-Yarbro, Tracey, Co-Editor; Rigal, Barry, Co-Editor (2011). The Official Encyclopedia of Bridge (7th ed.). Horn Lake, MS: American Contract Bridge League. ISBN 978-0-939460-99-1. CS1 maint: Extra text: authors list (link) Retrieved from In the card game contract bridge, a splinter bid is a convention whereby a double jump response in a side-suit indicates excellent support (at least four cards), a singleton or void in that side-suit (but preferably not the ace or king), and at least game-going strength. Some partnerships agree that the maximum strength can be only that necessary to reach a game contract; stronger holdings with major suit support instead might temporize with a Jacoby 2NT bid. Examples edit For example, a four clubs (4 ) response to a one heart (1 ) opening establishes hearts as trump suit and indicates a singleton or void in clubs. Different bidding systems may specify different strengths for responders hand, e.g. HCP), 10-14 or 11-15, for a splinter.
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