[pescetom]

MPs, nobody vulnerable, you deal and open 1♦ and it procedes (pass) 1♥ (1NT).
What are the meanings of your possible calls here and how is partner expected to react to each?

[nige1]

For a start, without any special agreements, perhaps...
-- Double= PEN 14+ HCP.
-- Pass = NAT, Usually BAL 11-13.
-- 2♥/3♥/4♥ = PRE. Weak 4+ ♥.
-- 2♦/3♦ = PRE. Weak.
-- 2♣/♠ = NAT N/F Weak, shapely.
-- 2N = ART 6+ ♦s 4+ ♣s.
-- 3♣/♠ = NAT shapely 5+ 5.

Alternatively
- Double = ART Support exactly 3 ♥s.
- Pass = F1.

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[pescetom]

nige1, on 2019-July-03, 11:16, said:

For a start, without any special agreements, perhaps...
-- Double= PEN 14+ HCP.
-- Pass = NAT, Usually BAL 11-13.
-- 2♥/3♥/4♥ = PRE. Weak 4+ ♥.
-- 2♦/3♦ = PRE. Weak.
-- 2♣/♠ = NAT N/F Weak, shapely.
-- 2N = ART 6+ ♦s 4+ ♣s.
-- 3♣/♠ = NAT shapely 5+ 5.

Alternatively
- Double = ART Support exactly 3 ♥s.
- Pass = F1.

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Thanks very much Nige. That's close to what I would assume, except for the 2N - could you elaborate please?

My main doubt was about how people are using Double here, because Penalty 14+ is not great I think (at least for us playing in an RA that disallows psyches at club level). I can see the case for Support Double but we're not ready to cross that bridge yet.

I was also wondering if anyone was using 2♣ as artificial here, and if so with what responses/developments.