Posted 2009-May-19, 12:29
1♥ is about as obvious as it gets, unless you have a special convention for these hands.
What to do next is a matter of bidding style and how often partner raises with three-card support. Personally, and this may be funny to some, I would be assured of 4-card support of partner raised hearts, as in my partnerships we only raise with three-card support when holding a hand pattern necessitating a reverse to describe but with insufficient values to reverse, and that cannot happen after 1♦-P-1♥. The funny part, though, is that a slight problem actually arises if Opener bids 1♠, because we might very well bid 3-card spade suits with a COV in spades and 3253 shape.
FWIW, using this "too weak to reverse" approach, you sort of do something similar to Josh's approach. 2NT asks, and Opener rebids his minor with 3-card support only. In many situations, this shows a specific, known 5431 shape. If the outside suits could be 4-1 or 1-4, meaning after a 1♣ opening and a 1♠ response, that also can be unwound: (1♣-1♠-2♠-2NT-3♣!-3♦?-3♥ = 3415, but 3♠ = 3145).
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-P.J. Painter.