A variation of ASTRO devised by Terence Reese (the name comes from a popular British brand of aspirin). After an opponent opens 1NT, 2♣ shows hearts and another suit while 2♦ shows spades and a minor suit. Advancer, if not holding support for the overcaller’s anchor suit, bids the next suit up as a relay. The overcaller can then show a fifth card in the anchor suit or the second suit.
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