[mgoetze]

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1♣ = 11-13 bal or 17+ any
3♦ = Hearts, INV+ opposite 11-13 bal

I couldn't find much in the notes except that bidding their suit at the 3-level asks for a stopper, which doesn't seem to be an option here.
It would seem to me that both 3♥ and 4♥ show the weak balanced hand, 3♠ and 4♣ should be NAT GF, leaving 4♦ and 4NT as strong heart raises. Does that sound right?

If that sounds right to you, would you bid 4♦ here or 4NT? If you bid 4♦ and partner bids 4♥, do you give up?

[antonylee]

4♦ then give up, I don't have that much more than promised (yes yes I know aces but well).

[steve2005]

antonylee, on 2012-March-16, 13:57, said:

4♦ then give up, I don't have that much more than promised (yes yes I know aces but well).

i agree with anthony

[kreivi68]

I don't know much about Swan but I played swedish club (pass system Carrotti) back in the 80's.
After interference at two level 1♣ opening was treated like it was mini NT. So bids from
2NT upwards were lebensohlish. I think lebensohl or rubinsohl would do fine also here.

[gwnn]

4NT sounds like quantitative (which should be like a semi-balanced 20-21 count without a heart fit). 4♦ is the only bid available. Strong hand, not long clubs, not long spades, I guess that means it has a heart fit.