[campboy]

GreenMan, on 2013-September-03, 10:41, said:

As I read the quoted bits, a "system" may include variations based on position and vul; so you can play 5cM WNT 1/2 and 4cM SNT 3/4 against the same pair, or Precision NV/Acol V, if that's what you're doing for the whole session, but can't switch to Fantunes halfway through.

A system may include certain types of variations, but not others. Changing 5cM WNT to 4cM SNT is such a variation, but changing a natural 1C to a precision 1C isn't. So the first of your examples is fine, the second is two different basic systems and only permitted in 7-board or longer rounds.

Switching to Fantunes halfway through a session is fine, so long as you do so between rounds, because then you only play Fantunes against the pairs you meet in the second half of the session, and only play your original system against the rest.

[Vampyr]

campboy, on 2013-September-04, 05:26, said:

A system may include certain types of variations, but not others. Changing 5cM WNT to 4cM SNT is such a variation, but changing a natural 1C to a precision 1C isn't. So the first of your examples is fine, the second is two different basic systems and only permitted in 7-board or longer rounds.

Right, well this regulation is not well-known.

[hrothgar]

campboy, on 2013-September-04, 05:26, said:

A system may include certain types of variations, but not others. Changing 5cM WNT to 4cM SNT is such a variation, but changing a natural 1C to a precision 1C isn't. So the first of your examples is fine, the second is two different basic systems and only permitted in 7-board or longer rounds.

Where is this regulation posted?

[campboy]

Gordon already quoted it: it's from the blue book.

Quote

5 A 5 A partnership may play two basic systems at different positions or vulnerabilities only in Level 4 or Level 5 competitions, and only where rounds are of 7 boards or more. The partnership must display two system cards for each system, indicating the occasions when the different systems apply.

It is always permitted to vary certain parts of a system according to position and/or vulnerability. This includes, for example, variable NT openings and playing four or five card majors in different positions.

5 A 6 A partnership may play any number of different basic systems in one event provided that they play only one system against any given opposing partnership (other than as permitted by 5A5).

Greenman's first example only features variations which are "always permitted" but his second varies the basic system so requires longer rounds.

[hrothgar]

campboy, on 2013-September-04, 06:35, said:

Gordon already quoted it: it's from the blue book.



Greenman's first example only features variations which are "always permitted" but his second varies the basic system so requires longer rounds.

Here's the rub...

A number of people in this thread are asking about ACBL events.
Quoting the Blue book doesn't carry much weight on this side of the pond.

Please note: I would be much happier if the ACBL outsourced convention regulations to the EBU. (I am dead serious about this...)
However, until we reach that happy day, ...

[gordontd]

My posts were in response to one that began "In the EBU..."

Maybe the thread should be split.

[GreenMan]

Vampyr, on 2013-September-04, 00:33, said:

The big problem with the ACBL card is all the printing on it. It is a very small CC to begin with, and all of the space is given over to suggested methods and check-boxes.

Indeed; many years ago I spent a year in France and found their standard CC quite easy to read by comparison; the wasted space on the ACBL card is a crime. In serious partnerships I make my own from scratch, following the general layout but without all the freakin' boxes.

[blackshoe]

Trinidad, on 2013-September-04, 01:19, said:

But if rbfoster only wants to know the opponents'defense to his strong 1♣ and the meaning of advancer's double after 1x-1/2y-1/2z-Dbl (or 1x-Dbl-1y-Dbl) that doesn't take much time, does it?

Do we want a regulation that says "you can ask at most N questions?" How do we decide what N should be, given that the answers to some questions may be quite simple (and therefore short) and to others may be quite complex (and therefore long)? Do we give them a countdown clock, started when they begin to ask questions, and specify that when the clock dings, time's up, questions and answers cease, even if someone's in the middle of a sentence?

Re: splitting the thread. I can do that, but there are a couple of posts that it seems to me are equally applicable to both jurisdictions (and were made in response to posts about the EBU). I can't copy them, I either move them or don't. Where should I put them?

Keep in mind that thread drift is inevitable. It will happen even if we say "thread drift is not allowed".