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This is a list of bidding systems used in contract bridge. [1] [2] Systems listed have either had an historical impact on the development of bidding in the game or have been or are currently being used at the national or international levels of competition. Bidding systems are characterized as belonging to one of two broadly defined categories:
A bidding system in contract bridge is the set of agreements and understandings assigned to calls and sequences of calls used by a partnership, and includes a full description of the meaning of each treatment and convention. The purpose of bidding is for each partnership to ascertain which contract, whether made or defeated and whether bid by ...
It is also customary to retain the convention in the face of certain competitive actions, for example after a double by opener's LHO, or a negative double by partner. After an overcall by RHO, assuming that the bidding has not gone past 1NT, the convention is still on (for example after 1 ♦ - (pass) - 1 ♥ - (1 ♠) - X where X is a Support ...
Conventions to be played must be agreed by partners before play begins and must be disclosed to their opponents, either in advance by the use of convention cards or by alerts, announcements, and answers to questions about one's partner's bids once bidding has begun. Generally, this disclosure also must include the negative implications of ...
Popular bidding convention in contract bridge, used to determine number of partner's aces/kings to evaluate for slam bids. Blank (Adjective) Unprotected by other, usually lower cards in the same suit: "I held the blank king of spades." [citation needed] (Verb) To discard in such a way as to leave a card unprotected: "She blanked the king of ...
Unusual vs. unusual [1] is a competitive bidding convention used in contract bridge by the opening side after an opponent has made an overcall showing two suits (e.g. a Michaels cuebid or an Unusual notrump overcall).
An example for those wishing to abide by a published standard is The Laws of Rubber Bridge [50] as published by the American Contract Bridge League. The majority of rules mirror those of duplicate bridge in the bidding and play and differ primarily in procedures for dealing and scoring.
This article describes the contract bridge bidding convention. Devised by Kit Woolsey, [1] the convention is a defense against an opponent's one notrump opening; especially used at matchpoints. Initial bids are as follows: