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In the partnership card game contract bridge, the Blackwood convention is a bidding convention developed by Easley Blackwood in 1933 [1] and still widely used in the modern game. Its purpose is to enable the partnership to explore its possession of aces, kings and in some variants, the queen of trumps to judge whether a slam would be a feasible ...
Perhaps the most widely known and used conventions are Blackwood, which asks for and gives information about the number of aces and kings held, Stayman convention, used to discover a 4-4 fit in a major suit following an opening no trump bid, Jacoby transfers, used to find a 5-3 fit in a major suit, and strong two clubs to show a very strong ...
The Culbertson 4-5 notrump is a slam-seeking convention in the game of contract bridge.It was devised in the early 1930s by Ely Culbertson.Most four-notrump conventions (Blackwood and its variants being the best known) demand that bidder's partner define their hand using agreed codified responses.
Blackwood convention 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]
Byzantine Blackwood is a bidding convention in the game of bridge. Devised by Jack Marx , it is a complex version of the Blackwood convention (by which a four notrump (4NT) call asks about partner 's honor card holdings). [ 1 ]
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:
Norman four notrump (also Norman) is a slam bidding convention in the partnership card game contract bridge designed to help the partnership choose among the five-, six-, and seven-levels for the final contract. Norman four notrump is an alternative to the Blackwood convention family.
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 ...