Jim Fox jimfox00 at cox.net
Thu Nov 21 23:42:49 CET 2013

Yes, I think it was at least 20 if not 30 years ago that the ACBL scored
Swiss that way.  On the other hand, that was also about when Swiss events
were initially contested in ACBL, so maybe a little bit of time should be
given them to get it right.  Win by 1 imp or more was worth 1 point; tie 1/2
and loss zero.


After a fairly small number of years as I recall, wins of 1 or 2 imps (or
maybe 3) were scored as 3/4 - 1/4.  There were still many tied positions
most of the time.




From: blml-bounces at rtflb.org [mailto:blml-bounces at rtflb.org] On Behalf Of
Richard HILLS
Sent: 11/21/2013 5:10 PM
To: Bridge Laws Mailing List
Subject: Re: [BLML] Nike [SEC=UNOFFICIAL]




>(2) maintain the current decimalised Victory Point scale, or


>(3) adopt a +50 / -50 Victory Point scale, where 1 imp = 1 VP up to a

>ceiling of plus or minus 50 imps. For psychological / euphemistic reasons

>negative VPs will be avoided, thus a 100-0 Victory Point scale, so a match

>ending in an exact tie will give each team 50 VPs.


The problem with traditional VP scales (for example, the former WBF 25-0

VP scale) is the issue of "breakage". That is, accruing a particular extra

is usually worth zero extra VPs, but accruing a different extra imp is worth

one significant extra VP.


An extreme example of one imp being very privileged over other imps is a

VP scale formerly used in ACBL-land for some Swiss Teams events:

maximum VPs for winning a Swiss match by one imp (or by fifty imps);

minimum VPs for losing a Swiss match by one imp (or by fifty imps).


"Breakage" is not an issue in both options (2) and (3) above, as every imp

is sacred until their very high maximum VP ceilings are reached.


Monty Python (slightly modified):


Every imp is sacred

Every imp is great

If an imp is wasted

God gets quite irate.



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