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Inverted minors refers to a treatment introduced by the Kaplan–Sheinwold (K–S) bidding system for the popular card game bridge. The original structure of Precision, another bidding system, also employed inverted minors over a 1 ♦ opening. However, the treatment is no longer restricted to users of these bidding systems.
Inverted minor suit raises are used (a single raise is strong, a double raise is weak and preemptive). Weak two bids, including 2 ♦. 2 ♣ is the only strong, forcing opening. Defensively, simple overcalls are taken to have the same range as an opening bid, and take-out doubles emphasize distribution.
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:
See the Glossary of contract bridge terms for an explanation of unfamiliar words or phrases. Walsh is a convention used in the card game of bridge in response to an opening bid of 1 ♣. [1] The convention has its origins in the Walsh System [2] developed by Richard and Rhoda Walsh. [3]
Promises a four-card major and a longer minor. Advancer [2] can bid 2 ♣ to ask for the minor (pass or correct), 2 ♦ to ask for the major, or 2 ♥ or 2 ♠ to play. 2 ♣: Promises both majors. Advancer can bid 2 ♦ to ask which is better, so the overcaller's 2 ♣ bid can freely be made with 5-4 shape. 2 ♦: Promises one of the major ...
The method was devised by Jeff Rubens and published in The Bridge World. [ 1 ] Using Rubens advances, the available bids in the suits starting with the cue bid in opponent's suit up to and including the bid below a two-level support bid of the overcall are all transfer bids to the next suit.
Muiderberg is a bidding convention in the card game bridge. It is a two-level preemptive opening based on a two-suiter with precisely a five-card major and a minor suit (four-card or longer). In Muiderberg the 2 ♥ opening denotes five hearts and an unknown minor suit, whilst 2 ♠ denotes five spades and an unknown minor suit. The convention ...
In contract bridge, Bergen raises are conventional treatments of responses to a major suit opening in a five-card major system. [1] Developed by Marty Bergen and first published in April 1982, [2] Bergen raises are based on the Law of total tricks, a hand evaluation concept which states that with a combined nine trumps in the partnership one should compete to at least the three-level ...