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Double key-card Blackwood

I am moving now into rare and specialist territory.

Occasionally you might find yourself with a known double-fit early in the auction on two hands with slam potential.

Typically responder will start with a change of suit - opener will support responder’s suit vigorously - and responder will then revert to opener’s first suit.  There are other fairly natural ways of reaching the same situation, or you might perhaps have some advanced conventional agreement which imparts similar information.

Provided that one of the two suits has been agreed as the primary suit you will frequently be able to find the required information with normal cue-bidding and RKCB, and certainly a spiral scan method should prove effective, but it is not unreasonable to feel that some variation on RKCB might be well-suited to the situation, treating the kings in both suits as key-cards and also attaching extra significance to the queens in the two suits.

My only source on this method is an article by David Gold in the June 2019 edition of English Bridge.

For an authoritative treatment of the method I shall refer you to that article via the ebu site.

Context  -  Acol bidding - the auction continues - in the slam zone - Blackwood etc..

This page last updated 8th Jun 2019