[Zelandakh]

Codo seemed to have given the answer with the very first reply - system on. I saw no reason to add a me too response and would suggest that your guess is probably better than mine anyway. I thought Frances' question was more interesting but noone seems to have picked up on that one.

[Fluffy]

mgoetze, on 2012-March-01, 06:34, said:

I mean, if we open 1NT and opponent doubles, we pretty much don't care what double means, 2♥ still shows spades, right?

rrrrr.... NO?

[fromageGB]

Zelandakh, on 2012-March-02, 07:54, said:

I thought Frances' question was more interesting but noone seems to have picked up on that one.

FrancesHinden, on 2012-March-01, 12:40, said:

but
1C - (x) - 1H - 1S as 3-card support, and 1NT as a weak NT after intervention.
...and I've then got to guess which of those I'm playing.

No guess needed. We agree it is system on, so do whatever system says. Even with a pickup you will have agreed whether 1♠ shows 3 or 1♠ shows 2 or 3 in a weak NT. Otherwise you will come unstuck on board 1 !
Anything else would need to have been discussed.

[kgr]

1♣-(1Y/DBL)-RDBL/DBL/1Z I play all as transfer. I would think it is standard and even more useful then without the intervention.
And if you play T-Walsh it is logic that 1♦-(1♥)-DBL is also transfer to ♠