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Bids of 5 ♣, 5 ♦ and 5 ♥ present a Voidwood, denoting the void in the suit bid and asking for other key cards. The responses are, as in RKCB: 1st step – 0 or 3 key cards (1 or 4, if playing 1430) 2nd step – 1 or 4 key cards (0 or 3) 3rd step – 2 key cards without trump queen; 4th step – 2 key cards with trump queen
1430 or 1430 RKCB A mnemonic for a variant response structure to the Roman Key Card Blackwood convention. It represents "1 or 4" and "3 or 0", meaning that the lowest step response (5 ♣) to the 4NT key card asking bid shows responder has one or four keycards and the next step (5 ♦) shows three or zero. 1RF One round force. 2-under preempts
In a more modern form, known as Roman Key Card Blackwood (RKCB), the 4NT bid asks partner to disclose the number of key cards held where the five key cards are the four aces and the king of trumps. Responses are stepwise: 5 ♣ for 0 or 3 key cards, 5 ♦ for 1 or 4, 5 ♥ for 2 without the trump queen, 5 ♠ for 2 with the trump queen. Some ...
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.
Contract bridge is a trick-taking card game played by four players in two competing partnerships in which a sequence of bidding, also known as the auction, precedes the play of the cards. The purpose of this bidding is for players to inform their partners of the content of their hand and to arrive at a suitable contract at which to play the ...
Blackwood (either the original version or Roman Key Card) How the partnership's bidding practices will be varied if their opponents intervene or compete. Point count required for 1 NT opening bid ('mini' 10–12, 'weak' 12–14, 'strong' 15–17 or 16–18) Stayman (together with Blackwood, described as "the two most famous conventions in ...
Having determined the degree of interest in exploring slam possibilities, the methods and conventions to determine which controls (aces, kings and even queens) are held by the partnership include: the Blackwood convention, the Norman four notrump convention, the Roman Key Card Blackwood convention and cuebids.
Precision: 5 clubs and a 4−card major, or 6 clubs, 11–14 HCP 2 ♦ response – relay, forcing to 3♣. Opener shows a 4-card suit (3 ♦ shows extras) or makes a choice between 2NT and 3♣ with long clubs. 2 ♥ /2♠ response – not forcing, good 5-card suit (7–11 HCP) 2NT response – weak support in clubs or GF two-suiter. Puppet to ...