The regulation in question is
Quote: EBU Orange book 1998 |
5.2 Basic Rules 5.2.1 You must alert a call if (a) it is not 'natural' (see 5.3). (b) it is natural, but you have an agreement by which it is forcing or non-forcing in a way that your opponents are unlikely to expect. (c) it is natural, but its meaning is affected by other agreements which your opponents are unlikely to expect.
|
The wording of (c) which is what you are querying was designed to suggest that a fairly normal treatment does not need an alert.
Let us look at your examples.
Example 1 seems to be easy since it is quoted in the Orange book - see 5.4.3(f). It is not alertable.
However!
Several people have been extremely rude about that item, and it has probably got more bad press than anything else in alerting. I suggest alerting it would be a good idea: too many people think the Committee got that one wrong.
Examples 2 and 3 are borderline. Quite frankly there is a case for alerting in each case, probably more so in Example 3 than Example 2, because in Example 2 other bids show strong hands with or without the good-bad approach. Even in Example 3 you could ask "Do they really not expect this?"
To be honest, I think all three examples are fairly borderline!