helene_t, on 2013-October-02, 15:38, said:
In EBU you alert undiscussed calls if you base your own action on the assumption that they have an alertable meaning. (In this case that is probably not the case).
There's been a slight change to the regulation. It now reads:
Quote
[BB2D2]Unless a player knows that his partners call is not alertable (or announceable) he must alert.
The bit about alerting if you're unsure but are going to act as if it had an alertable meaning has gone. I agree with Robin that it is quite common to play Jacoby (albeit maybe not game forcing) over an overcall. So if there's any doubt in West's mind that they are playing Jacoby over an overcall they should alert.
I'm suspicious of North's claim that he would have bid 4
♠. I agree that East has no alternative to removing 3NT to 4
♥, but playing a different system in which West could have a four-card suit and a strong NT shape this would have been a difficult decision.
Ruling: score stands.