mikeh, on 2026-March-10, 17:50, said:
1S 1N…forcing. I love this hand because my wife and her partners have recently adopted 1N as semi forcing, putting some invitational hands through 2C. I’ve pointed out that this inevitably means bad results when opener passes and responder has a marked but weakish one or two suited.
1S 1N 2N. 2N is 17-19, usually 5332. 3N instead shows long strong spades, usually some 6322.
I think this is uncharacteristically flawed analysis. I'm very happy to be playing a semiforcing NT, but on this deal it doesn't matter a single bit. With a semiforcing NT, opener passes the 1NT response only with specific weak hands. This is likely a worse contract than responder's strain when responder has a weak hand and a long suit, but on those deals the opponents tend to be in the auction and we frequently don't buy the contract at the 2-level. When it does happen, though, we lose. In return, the 1M-1NT; 2m sequence promises at least four cards in the minor suit, permitting raises and supporting better hand evaluation. I'd prefer it if you waited for a deal where it actually cost before emphasising this downside of the semiforcing notrump.
Personally I think putting some non-gameforcing hands in 2
♣ is a much bigger concern. I've played this for a while and absolutely hated it. What's more, it goes contrary to one of the design aspects of the semiforcing NT: if your hand can't tolerate much beyond 1NT facing 12-14 balanced, respond SF 1NT. In my opinion, the whole point of having a F1NT or SF1NT in the first place is to enable GF 2/1 sequences and cope with the wider range of the catchall 1NT response - your wife's approach seems weaker to me.
mikeh, on 2026-March-10, 17:50, said:
Over 2N, virtually every good player in NA ( if playing 2/1 and not using gazzilli over 1N) uses transfers here. Transfers are infinitely better than the two main NA alternatives of new minor or Wolff.
This shows why I wouldn't be able to hack it in NA. I play natural here, having narrowly limited opener's shape and strength and having split out several of responder's possible hands through negative inference last round.
mikeh, on 2026-March-10, 17:50, said:
1S 1N 2N 3D 3H 4D 4H. End.
Responder has shown a goodish 5=5 in the reds and while west likes his hand, he needs (imo) a third card in a red suit to get excited, and East has no reason to think that slam is good and no safe way to find out.
As I said going in, nobody knows how to bid freaks. There are, as usual, some who have magic sequences when shown both hands.
In my methods I don't get as much room due to lack of a transfer, so 1
♠-1NT; 2NT-3
♥; 3NT-4
♦; 4
♥-P it is for me. Alternatively opener might decide to treat the hand as a two-suiter rather than balanced - I think this is not a good idea, but technically the shape is there - in which case we'd bid 1
♠-1NT; 3
♣-3
♥; 3NT-4
♥; P. On this sequence responder has no way to introduce the diamonds.