Cyberyeti, on 2012-June-14, 06:11, said:
Whether you play fourth suit forcing to game or just for one round is irrelevant here, 4th suit followed by 3♥ says "I was too good to bid a non forcing 3♥ directly" and is forcing to game.
I don't see why this would be irrelevant. If you are playing a direct jump to 3h over 1s as forcing (an older style, as advocated by Bobby Goldman, Richard Pavlicek, which I feel has certain advantages and have never seen any convincing argument why modern fashion is superior), and put invitational hands through 4th suit 1rf, then this 3h is reasonably played as invitational.
If the direct jump to 3h is non-forcing (as most play these days), then the fourth-suit forcing auction would logically be forcing. If you are playing 2nd round jumps as inv, I don't really see how you can not play 4th suit as a GF, and only play it as "forcing one round". Which auctions wouldn't be GF in that case?