[bd71]

Suppose you deal and bidding goes:

2♥ (2♠) P (4♠)
P (P) 4N

What do you think partner is up to (AKA is this defined)?

Do it change based on partner's experience/skill/sophistication level, and if so how?

[manudude03]

both minors and a weak-ish hand.

[aguahombre]

By "Is it defined?" Do you mean would it likely be part of any standard text on responding to weak two's? It probably isn't, but would seem to be defined by common sense as a minor-suit takeout.

Partner's experience/skill/level might affect whether he/she was right to do it on this hand. There would have been no opportunity on the previous round to show this type of hand, so the previous pass doesn't change anything.

[Free]

I would take it as at least 2 places to play. Not sure if there's ever a right hand to do this with...

[kenrexford]

Interesting question.

In one partnership, I played that this kind of bid, if not otherwise making sense, was a probe call. I might do this with the intent of bidding 5♥ as a sacrifice. However, with anticipation that perhaps the opponents will bid 5♠ only after partner gets a chance to bid, my call asks for partner's take on lead. (Sure -- 5♠ might be bid before partner gets the chance, but then my 4NT call puts pressure on Responder to bid out of fear that my partner can help the defense.)

The full auction might be, for instance:

2♥-(2♠)-P-(4♠)
P-P-4NT-P-
5♣-5♠-all pass

Now, I know to lead a club, or that a club lead might make sense. If partner had bid 5♦, that lead looks better. If 5♥, I stick with our normal lead.

I suppose one could call 4NT "forcing, asking for a feature."

[Fluffy]

obviously both minors, a 6-6 or 6-5 if favourable. Can´t think of a hand with hearts that will bid this way, but won´t tule it out completelly