[frank0]

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What's your agreement with your partner(or whatever you think is better approach) on XX?

(a)pass=nowhere to run, XX=run, I have weak 3 suiter
(b)XX=opp jokes, don't run even if you bid 3NT based on long minor suit instead of HCP, pass=you can run if you have a long minor and weak
©something else

[dwar0123]

Assuming the 3nt is a typical long suit with a diamond stopper, I'd interpret 4clubs as it is time to run, pass as being meh and xx as in I think we might have slam but this sounds like more fun.

[aguahombre]

This thread touches on the same question.

Many times a direct 3NT overcall of a 3-level preempt must be attempted as the best percentage action over the long run, but will have a flaw. The 3NT bidder might be considering a run-out if doubled. Partner's redouble (not always successful, of course) should be "It's O.K., stick with it." The rewinder will probably have some nice fillers to make 3NT a good deal.

A few times over the years we have encountered a double of the 3NT overcall which was tactical in nature to get us off our good spot. I am not saying we should be looking for this to happen again, but it might be another reason for the redouble to be to play.

BTW, I do not agree that 3NT is typically bid with a long suit and a stop. Certainly that is one possibility, though. Much more common would be a balanced 18 or so.

[Phil]

It makes the most sense for overcaller's xx to be "I'm not sure", but responder's xx to mean, "is making 4 1000 or 1200"?

[Codo]

To me XX over 3 NT is always a question mark- but from both the 3 NT bidder and his partner. In this special case, I would prefer Phils idea instead.

[FrancesHinden]

Phil, on 2012-February-09, 21:52, said:

It makes the most sense for overcaller's xx to be "I'm not sure", but responder's xx to mean, "is making 4 1000 or 1200"?

Yes, after (3something) 3NT (dbl) an immediate redouble says "this is making and you are wrong", while I agree there's little point in overcaller's redouble meaning that, he can't be _that_ confident or he was too strong to overcall 3NT in the first place.

This is consistent with my agreements after 1NT dbl P P and 2NT dbl P P - in both cases the NT bidder's redouble means "I have a long suit, should I be running?"

[aguahombre]

FrancesHinden, on 2012-February-13, 17:43, said:

This is consistent with my agreements after 1NT dbl P P and 2NT dbl P P - in both cases the NT bidder's redouble means "I have a long suit, should I be running?"

Yeh, that's what it used to mean here, too; but then I realized how many times the double and the pass by the opponents were due to their bidding misunderstanding or misjudgement ---and, now partner is the only one who gets to run from my opening NT, or suggest running from it.