[barmar]

The interesting thing is that the Alert Procedure includes a definition of "Control Bid":

Quote

A bid, not intended as a place to play, which denotes a control (usually first or second round). The control need not be in the denomination named, These bids are used to investigate slam

but then never actually refers to them anywhere else.

Maybe it's because they were only thinking of the slam investigations, which are usually above 3NT -- there's a general rule that bids above 3NT do not get immediate alerts starting with opener's rebid, so there's no need to say whether these are alertable. But that still suggests that they should get a delayed alert, which no one ever does, either.

[blackshoe]

 barmar, on 2018-March-02, 09:51, said:

The interesting thing is that the Alert Procedure includes a definition of "Control Bid":

but then never actually refers to them anywhere else.

Maybe it's because they were only thinking of the slam investigations, which are usually above 3NT -- there's a general rule that bids above 3NT do not get immediate alerts starting with opener's rebid, so there's no need to say whether these are alertable. But that still suggests that they should get a delayed alert, which no one ever does, either.

One of the problems with the delayed alert procedure is people hear about "no alerts above 3NT" and think nothing is alertable. To my mind, whether something requires an alert is the first priority - the question when you make the alert is secondary.