Thanks to all those who replied so far. I am consoled that it is recognised as an unusual situation and that only some consider it immediately obvious what to do.
rmnka447, on 2018-April-04, 13:38, said:
Your pass over 1 NT promised anywhere from 0-7 HCP. It also denied a 5 ♠ spade suit or a longer minor as you would likely run from 1 NT with such a holding. So, you have so far accurately described you hand.
Partner has taken an unusual action in doubling.
That's much what I was thinking too. Especially as it was the last round of the tournament against a strong opponent
sfi, on 2018-April-04, 16:32, said:
It has been a long time since I've played with anyone who would treat this as a penalty double. 3C unless I've discussed something that suggests it isn't takeout.
It's not partner's style to look for low level penalties and we have no specific agreement that double after NT is punishment, or whatever.
But it's not easy to imagine why he would want to make a pure takeout in these circumstances either.
ggwhiz, on 2018-April-04, 16:41, said:
Fixed the vulnerability in the diagram, thanks.
Tramticket, on 2018-April-05, 04:51, said:
There are three possibilities for partner's double: take-out, "values", penalties:
- If West has a hand suitable for a take-out double, then why was it not suitable for a take-out double on the last round of bidding? I suppose that it is possible for partner to hold support for the other three suits and (say) ♥AQ. Or maybe partner is trying to suggest both minors? Its all a bit esoteric for me.
- I don't understand why partner would want to show values and ask us to do something sensible. Partner has already tightly defined their hand with the 1NT over-call. What extras can he have?
- This leaves a penalty double. Partner has already shown heart values with the 1NT bid and it sounds like the opponents have chanced their arm to try to push you out of the 1NT prime spot. On this occasion they have pushed too hard and partner is able to wield the axe. A penalty double is clearly right.
It would be showing a lack of faith to remove partner's penalty double.
This is the conclusion I came to, reluctantly. No other explanation really makes sense. So I trust his judgement and pass.
"Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth." (Arthur Conan Doyle)
MPs, both sides vulnerable, you are sitting in East.
South is an expert playing a natural 4 card majors system.
You are playing 5 card majors with strong NT (15-17), partner's 1NT is natural promising a stop in ♥.
After his double, what can you deduce and what is your bid?