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In other words, a partner who has previously shown, for example, 12-15 range of high points is unlikely to hold 3 aces for his bid, etc. Even Roman Blackwood convention has several variations, revolving around 5 ♥ and 5 ♠ responses. In all variants, they denote 2 aces. One variation is that 5 ♠ shows extra values, while 5 ♥ does not.
A mnemonic for the original (Roman) response structure to the Roman Key Card Blackwood convention. It represents "3 or 0" and "1 or 4", meaning that the lowest step response (5 ♣ ) to the 4NT key card asking bid shows responder has three or zero keycards and the next step (5 ♦ ) shows one or four.
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 ]
3 ♦ or higher, etc. on up the line. With ace-showing responses, the responder bids the suit of the Ace, 2NT with two or more kings, and 2 ♦ with a king or less. With (unlikely) 2 aces, the responder bids 3 ♥. As a corollary, subsequent Blackwood by the opener asks for kings rather than aces.
Pay to the order of line: The payee line designates who you wrote the check to and who can receive the money. Dollar amount box: This is the box with a dollar sign in it where you fill out the ...
[2] [3] It is similar to Blackwood but uses 4 ♣ instead of 4NT as a relay (asking) bid to inquire about the number of aces held by partner. A further relay bid may follow to inquire about the number of kings held. Gerber is used primarily after notrump openings, responses, and rebids, making it a complement to Blackwood rather than a replacement.
Like SAYC, BBO basic depends upon hand evaluation using the high card point (HCP) method. Hand shape adjustments are made for long suits (1 point additional for every card longer than 4 in a suit), when bidding a new suit, and for short suits when showing support for partners bid (5 for a void, 3 for a singleton, and 1 for a doubleton). [2]
Norman four notrump is an alternative to the Blackwood convention family. Used when the contract level can be better determined by knowing the numbers of aces and kings that are "missing" in the partnership's two hands, the convention is initiated by a bid of 4NT to ask that partner provide information about his ace and king holdings.