Asptro is a
contract bridge
Contract bridge, or simply bridge, is a trick-taking card game using a standard 52-card deck. In its basic format, it is played by four players in two competing partnerships, with partners sitting opposite each other around a table. Millions o ...
bidding convention used to intervene over a 1NT
opening bid.
Its methodology and hence its designation is a combination of two similar conventions –
Aspro and
Astro.
*2 shows at least 5-4 either way round in hearts, the ''anchor'', and a
minor suit. Exceptionally the intervenor holds hearts and spades with preference for spades.
*2 shows at least 5-4 either way round in spades, the anchor, and another suit. If the other suit is hearts, there is preference for hearts.
*2 and 2 are natural.
Partner can bid two of the anchor suit, 2M, expecting to play that contract (sign off). 2 is a non-forcing enquiry, if available, and 2NT is a forcing enquiry. Other replies are natural. Responder can also pass with 6+ length in the bid minor. (You cannot expect support from partner but it might be the least evil).
After a 2 reply, the 2 intervenor passes with five diamonds or bids the 5 card suit, always the unknown one with 5-5.
After a 2NT reply, the intervenor routinely bids the unknown suit. Both the anchor and the unknown major imply both majors with preference for the new one. Thus 3 and 3 may be refined, such as by a strength difference with 3 stronger.
See also
*
List of defenses to 1NT This is a list of defensive conventions used in the game of contract bridge to compete in the bidding after the opponents have opened with a one notrump (1NT) bid.
* ANTI
* Aspro
* Asptro, a hybrid of Astro and Aspro
* Astro, Modified Astro, ...
References
{{WPCBIndex
Bridge conventions