Hmm, I routinely play Gerber in NT auctions and thus 4NT is quantitative invitational. In most of these partnerships the invitation is accepted by replying Blackwood aces just to double-check. This seems pretty straightforward and harmless to me, maybe I'm misunderstanding something.
With that agreement I expect the "diamonds-only" forcing hand to go through 2♦ transfer and then 3♦ cancelling the transfer. For me, the 2♣ call promised a 4-card major (alas the other one) along with the 5+ diamonds. GF for me.
This. It works in any partnership with no additional memory overhead.
Across from 1NT overcall, our 1NT system is on and that includes system for handling interference, be that lebensohl, Rubinsohl, stolen bid, all natural, whatever.
The opponents have stuck their nose(s) into a live auction, ergo doubles are for penalty. We don't have a fit. 3NT might make on a good day -- wish I had some 10s and 9s -- but 2♠ whacked looks like a good bet for at least +300.
3♦, expecting laughter and derision here but would welcome some thoughtful discussion. I can't think of a way to find out if 6♦ has a decent play, so I'm hoping pard can work out my fourth-seat preempt and find 3NT with major suit stoppers.
NS were most definitely damaged, an alert was required.
ACBL Alert Procedures states almost this exact example.
Most cuebids are not Alertable. However, any cuebid which conveys a very unusual or unexpected meaning still requires an Alert.
Example: 1♠-2 ...