Astro convention

Astro is a contract bridge bidding convention used to intervene over an opponent`s one notrump (1NT) opening bid. The name is derived from the initials of the surnames of its inventors - Paul Allinger, Roger Stern and Lawrence Rosler. Astro employs a 2-level overcall in a minor suit when {gcb|intervenor} holds an unbalanced hand with at least nin....
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