[sailwave] Re: Personal Handicaps - How can we help ???

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Hi Huw,
The YR2 document was really interesting and helpfull. However, does anyone know of a list that contains descriptions of several widely used personal handicapping methods?
Thanks
George Gardner

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-----Original Message-----

From: Huw Pearce

Sent: Dec 12, 2007 12:00 PM

To: sailwave@yahoogroups.com

Subject: RE: [sailwave] Re: Personal Handicaps - How can we help ???

Hi Mal,

The avebcr(x) function is a simplistic option for Personal Handicapping and there are clubs using this as the basis for their personal handicapping. BCR is the Back Calculated Rating in an individual race for each competitor that they would have had to had to come equal first in that race.

Here in the UK the RYA publish a method in a document called YR2, which can be obtained at http://www.rya.org.uk/KnowledgeBase/technical/pys.htm, for calculating the rating of each competitor in a race based on a statistical analysis of corrected times. The RYA also make available for download a Microsoft Excel spreadsheet, “Basic Results and Number Adjustment” worksheet link at http://www.rya.org.uk/KnowledgeBase/technical/pys.htm. This is the method that underpins the RYA Annual PN ratings return, but those wishing to make a return have to take the information from the individual race spreadsheets and manually combine into a form that can help determine the rating value for a class to be sent back to the RYA each September/October.

The method described by the RYA is what quite a few Sailwave users here in the UK would like to see Colin implement.

Kind regards,

Huw

-----Original Message-----
From: sailwave@yahoogroup s.com [mailto:sailwave@yahoogroups.com]On Behalf Of Mal Hartland
Sent: 11 December 2007 15:25
To:
sailwave@yahoogroups.com
Subject: RE: [sailwave] Re: Personal Handicaps - How can we help ???

For an individual, is this not what the avebcr(x) function within sailwave already does?
This can then be applied in the Tools/Apply personal handicap/expression…
Regards
Mal

When I was responsible for running personal handicap scoring (albeit
within a fleet system), I inherited a flat time allowance per race,
which favoured the slower crews in a short race and the faster crews

in a long race.

I changed this to an allowance based on percentages - adjusting the
PY down from the standard for the class by x%, initially to arrive
at the same 'flat' time allowance over a 60 minute race. This took
the race length inequality out of the system and seemed to work
well. The adjusted PY's were worked out manually at the start of the
season & applied for the series. (Improver's prizes were awarded

monthly).

Sailwave coped well with this approach, but I guess what would be
really useful would be the ability to 'back-calculate' a new PY from
elapsed times over a range of races. Do this for an individual to
arrive at a personal handicap, or a group of boats to get a class
handicap for your particular sailing location...

Sounds easy, but I bet it isn’t.

Sailwave is still the best bit of free software I've ever come
across - many thanks.

To: sailwave@yahoogroups.com
From: nick@willowmead.org.uk
Date: Tue, 11 Dec 2007 13:55:11 +0000
Subject: [sailwave] Re: Personal Handicaps - How can we help ???

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