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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.
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:
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.
Inverted minors An agreement that treats the single raise of a minor suit as strong, and a double raise as preemptive. Invitation A bid which invites the partner to bid on to game or slam if he has extra values. It is a non-forcing bid by definition. Compare semi-forcing bid. IPBM International Popular Bridge Monthly, a British bridge magazine.
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]
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.
In the card game of bridge, the unusual notrump [1] is a conventional overcall showing a two-suited hand. It was originally devised by Al Roth in 1948 with Tobias Stone, [2] to show the minor suits after the opponents opened in a major. The convention concept is now generally extended to show the "two lowest unbid" suits.
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 ...