The_Badger, on 2017-July-09, 05:45, said:
But was 2
♥ a feasible bid given that there are plenty of hands where partner will pass 2
♣ and 4
♥ is a reasonable contract
But let's modified that hand slightly
Now would 2
♥ be such a bad rebid by West with this hand, for example?
I'd like to discuss this part of the post.
Recently I had a poll here and on BridgeWinners about responder's rebid with Axx, QTxxxxx, JTxx, void after 1C-1H-2C. Most players rebid 2H but some who bid 2C were defiant, unwilling to consider that anyone with bridge talent would bid 2H. Let's switch the jack and ace so it pairs with your example hand.
4H is a decent contract if the opponents don't lead trump. Would you get there? It's not hard to see that you'd rather play 2H which is virtually cold than 2C which rates to lose two hearts and four clubs. If you're playing with one of the passers of 2C in my poll, maybe you need to raise to 2H with this hand.
However, as most players rebid 2H with the East hand, I'm not sure I can agree with the statement that there are plenty of hands that make 4H where partner bids 2C. Or at least I'll disagree that 4H is
biddable and makeable when partner bids 2C. If you're playing IMPs, there's not much loss in making 90 or 110 instead of 170 when game isn't biddable. For if responder has six hearts, most players are rebidding them, and minimum repsonders with five hearts aren't likely to move even when you support the hearts. Invitational responders are almost always going to find another bid after 2C (with five hearts, this bid will probably be 2NT, 3C, or 2D.) So I don't see the rush to raise hearts here.
Let's try the original hand.
This time 2C is a fine IMP contract as 4H has major handling problems.
And to answer your question, I'm one of those people who virtually always has four cards for a raise and my judgment tells me to raise on all of your examples in the poll.