Aspro convention

{{Distinguish|Astro convention|Asptro convention}}

{{Main|Contract bridge|Bidding system|Bridge convention|Glossary of contract bridge terms}}

AsproThe name is borrowed from a popular British brand of aspirin. is a contract bridge bidding convention devised by Terence Reese{{OEB|7|267}} as a British variant on the Astro convention{{cite book |last = Crowhurst |first = Eric |title = Acol in Competition |publisher = Pelham Books |location = London |page = [https://archive.org/details/acolincompetitio0000crow/page/290 290] |year = 1980 |isbn = 0-7207-1273-4 |url = https://archive.org/details/acolincompetitio0000crow/page/290 }} to intervene over a 1NT opening bid.

Like Astro, Aspro is initiated by a 2-level overcall in a minor suit when the overcaller or intervenorIn the description of competitive bidding, players are referred to as either the Opener (the first to make a {{gcb|bid}}), the Intervenor (the opponent who makes his side’s first bid), the Responder (partner of the Opener) or the Advancer (partner of the Intervenor). holds an unbalanced hand with at least nine cards in two suits (i.e. 5 in one and 4 in the other), at least one of which is a major.

:*2{{Clubs}} shows hearts and another suit, and

:*2{{Diams}} shows spades and a minor suit.