Reverse (bridge)

A reverse, in the card game contract bridge, is a bidding sequence designed to show additional strength without the need to make a jump bid; specifically two suits are bid in the "reverse" order to that expected by the basic bidding system. Precise methods and definitions vary with country and system. In Standard American a reverse is defined by William S. Root ["The ABCs of Bridge" William S. Root. 1998 Three Rivers Press. [ISBN 0-609-80162-7] ] as "... a nonjump bid at the two-level in a new suit "that ranks higher than the suit you bid first", and by Bridge World [cite web|url=|title=The Bridge World: Bridge Glossary|publisher=The Bridge World] . as "a non-jump bid in a new suit that bypasses a bid in a lower-ranking suit already bid by the same player". The Acol definition is somewhat wider and includes "any bid of a new suit by opener higher than two of their first suit". ["Really Easy Bidding" 1998 EBU [ISBN 0-9506279-2-5] ]

An example satisfying both definitions is::1Clubs - 1Spades; 2Hearts

The last bid is a reverse.

Note responder avoided making an initial response of 1Hearts. Despite this, opener chose to bid 2Hearts, apparently seeking a fit that is unlikely to exist. This seemingly odd bidding is the "reverse" of what one would expect with a minimum hand (keeping the bidding low) and is used only with strong hands as it consumes bidding space.

Opener's reverse

This shows a minimum of 16-19 points, depending on system, and at least 5 cards in the first bid suit.

Opener's reverse may face a weak responding hand, with which responder may have intended (over a simple suit rebid) to have rebid his own suit or taken a preference to opener's first suit at the two level. Opener's reverse still allows responder to rebid his suit at the two level, but a preference to opener's first suit must be at the three level. Thus, opener's reverse must show values at least one trick beyond the minimum needed to open.

For example, following 1Diams – 1Spades ; 2Hearts - ?, responder may have a weak hand such as SpadesQJ86 HeartsK2 Diams8762 ClubsQ74 and be planning to rebid 2Diams, a simple preference, if opener made a typical rebid such as 1NT or 2Clubs, and to pass if opener rebid 2Spades or 2Diams. However, following the reverse, he must now rebid 3Diams. Thus the reverse has forced the partnership to commit to taking nine tricks instead of eight - based on the extra strength of opener.

Examples of reverse bidding sequences:
*1Clubs(by opener) – 1Spades(by responder); 2Diams(by opener - this bid is the "reverse")
*1Diams – 1Spades; 2Hearts
*1Diams – 1NT; 2Hearts
*1Hearts – 2Diams; 3Clubs Acol definition only
*1Spades – 2Hearts; 3Diams Acol definition only

A special case exists when responder makes a two-over-one initial bid. Since a two-over-one response shows more than a minimum, generally ten or more, opener does not need as strong a hand to reverse the bidding at that juncture. The modern trend is therefore to allow such a reverse bid after a two-over-one initial response with a minimum opening hand. [Root, William S. (1986). “Commonsense Bidding”, p.48. Three Rivers Press, New York. ISBN 0-517-88430-5] .

Opener's reverse need not be in a four card or longer suit, it can be made on a powerful three card minor suit, such as DiamsAQJ. This approach is useful in investigating notrump contracts and when no other 4-card suit is available to bid.

High and low level reverse

Reverse bids are generally considered to be forcing, with subtle variations depending on system:
*A "standard reverse" (called a "low level reverse" in the UK), when opener's second bid is in a new higher ranked suit at the two level, is forcing for one round only, if it follows a one level bid by responder
*A standard reverse following a two level bid by responder is unlikely to be passed before a game contract is reached, due to the additional points needed for the response
*Under 2/1 game forcing any rebid by opener following a two level response, which is itself forcing to game, cannot be passed until game is reached
*A "high level reverse" (a term used in the UK and in Acol), when opener's second bid is in a new lower ranked suit at the three level, is forcing to game.
*Strong club systems such as Precision Club have much less need for reverse bids to show extra strength because natural suit bids are limited. In that context, a reverse generally shows playing strength rather than high cards.

These examples illustrate high and low level reverses:
*1Clubs1Spades; 2Hearts : a "standard reverse"(or "low reverse") by opener - the 2Hearts bid is forcing for one round
*1Spades2Diams; 3Clubs : a "high reverse" by opener - the 3Clubs bid is forcing to game

In some variants of 2/1 game forcing, the major-suit reverse after the sequence 1Diams – 2Clubs doesn't promise extra values — opener may merely show a 4-card suit or a stoppercite web|url=|title=Bridge World Standard: Complete System BWS 2001|publisher=The Bridge World] . Kaplan-Sheinwold treats 1Diams – 1M; 2Clubs as a reverse although this is not standard in other systems.

Later bidding

Most pairs play a rebid of the suit and a 2NT rebid in response to opener's reverse as weak. Other responses, in particular the delayed raise of the opening suit, are forcing; thus:

:1Clubs - 1Hearts; 2Diams - ??

:::2Hearts : weak, 5+ card:::2Spades : strong relay (Fourth suit forcing):::2NT : weak relay:::3Clubs : forcing, 3+ card support

Responder's reverse

Most standard methods treat a responder's reverse as a game force. Responder's reverse usually follows a same suit rebid or a notrump rebid by opener, because otherwise it would be treated as conventional. Typical responder's reverse sequences are:

1Diams – 1Hearts; 1NT – 2Spades

1Clubs – 1Diams; 2Clubs – 2Hearts

Jump reverses

The term "jump reverse" denotes a jump bid in a suit in which a non-jump bid would be a reverse. Jump reverses after a major-suit response carry a special meaning. Most expert partnerships utilise this bid to denote game-going values with shortness (often specifically a singleton) in the suit bid and support for partner's major suit. An example of a jump reverse is:

1Clubs – 1Spades; 3Hearts

Partnerships utilising this agreement commonly agree that in this situation a splinter bid (i.e. a double jump in a new suit) indicates a void. [William S. Root and Richard Pavlicek, Modern bridge Conventions.] This is also the understanding used in Bridge World Standard, though other options may also be used.

Jump reverses after a 1NT response to a minor opening are often used to indicate game-going values with shortness in the suit bid (a singleton or void) and six cards or more in the minor suit opened. This agreement facilitates partner in deciding the final contract (in most cases 3NT or a game or slam in the opened minor).


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