pescetom, on 2023-July-06, 14:58, said:
Yet again I find myself unexpectedly in line with ACBL. At least one of the two is wandering
I find this a very strange decision by ACBL.
Historically its general philosophy has been that when a bid has a nearly universal artificial meaning, any other meaning is alerted. The common convention is either not alerted (e.g. Stayman and takeout doubles) or announced (e.g. Jacoby transfers).
An unalerted 2♣ response to 1NT will always be assumed to be some flavor of Stayman. Allowing it to be natural without an alert is a huge departure from their general approach, since no one would ever think of asking for an explanation. The basic idea can be summed up as "alert to warn the opponents that something unusual is happening and they may want to ask"
The previous version of the Alert procedure had the following general principle:
Quote
Natural bids that convey an unexpected meaning must be Alerted. This includes
strong bids that sound weak, weak bids that sound strong, and all other bids that, by
agreement, convey meanings different from, or in addition to, the expected meaning
ascribed to them.
strong bids that sound weak, weak bids that sound strong, and all other bids that, by
agreement, convey meanings different from, or in addition to, the expected meaning
ascribed to them.
I think non-Stayman 2♣ would fall under the highlighted case.
I wonder if this was an intentional change, or something that fell through the cracks in the redesign.