apollo1201, on 2024-November-25, 12:49, said:
Yes, at least where I live and when I played a lot - it might have changed since because it gets slippery very fast. But big renowned internationals advocate it.
When the bidding is 1C - 1M - 3C, you have more space obviously, 3D to show D stop and lack of oM and vice versa.
This diamonds issue happens as well on 1M-2D-3D auctions where you are stuck and have to bid 3M w/o values in the other M while 3 oM pinpoints the C hole. Given it could be a forcing fit with slam ambitions, the ambiguity can actually be worse.
TBH, the last time I had the case I closed my eye and bjd 3NT, please dear LHO, find the lead. Actually I feared that partner would not remember this rare treatment (and I was right). She had what I needed anyway so we played the same contract as anyone else. But some purists bid it more scientifically than us. And if it were Kx on dummy insteaf of Axx I had wrong sided it.
If 1D 1S 3D 3S is either 4 or 6 spades, please explain to me how opener knows when to raise with, say, Ax or Qxx and weakness in a side suit so 3N isn’t attractive?
You say some very good players use this ‘4 or 6’ treatment. I’ve seen a lot of weird agreements in my time….played a few too….but this one, imo, can’t be played both ethically and profitably. It’s profitable if one is illegally letting opener know which you have. It’s unethical if you do. It only works if opener ‘guesses’ correctly all the time and that’s literally impossible, over a long enough sample, absent something very bad going on.
And,btw, I do not think this sequence, 1S 2D 3D is analogous. After 1D 1S 3D, responder could be 7=6 in the majors (not likely of course but I exaggerate to make a point). There will be some hands, not many but not zero, where your side belongs in either hearts or spades. x AQx AKJxxx Kxx opposite Axxxx KJxxx x Ax. Please let me have a method of finding hearts.
Axx x AKJxxx AJx opposite KQxxx Axxxx x Kx. Please let me play in spades.
But after 1S 2D 3D there is, on a practical level, no chance we’ll ever decide to play in hearts! So 3H isn’t needed as showing a prospective trump suit. One can play it as showing a stopper and inviting 3N (tho pulling 3N retroactively makes it a control for slam purposes) or as asking for a stopper. I think, by a very narrow margin, that showing a stopper is superior, but it wouldn’t take much to make me change my mind.
After 1D 1S 3D, I think the best meaning for 3H is arguable. My sense is that it should show heart values, but be ambiguous as to length. Opener can’t raise. He bids 3S with a fit (if 3H happens to be based on 4+, then responder has at least 5 spades) and 3N with a club stop. 4D would be the default…no club card, not spade fit…I’ve never seen it happen.
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