e/Blackwood convention

Information
has gloss	eng: The Blackwood convention is a popular bidding convention in contract bridge that was developed by Easley Blackwood Sr. It is used to explore the partnership's possession of aces, kings and (in some cases) the queen of trumps, in order to judge more precisely whether a slam (ie making all, or all but one, tricks) is likely to be possible.
lexicalization	eng: Blackwood convention
instance of	e/Bridge convention