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Board » General Discussion » Proposal for Performance Handicapping

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The race info is in my spreadsheet. I'll separate out the info and post separately.
Here is a list of races from 2011 to today. It includes the race number, title, start time, number of entrants and number of finishers.
Attachments
Thanks for this smaller list that I can use as a table of contents for the period covered.
None so blind
The attached spreadsheet is a complete list of our races up to 1 March 2012. I'm ignoring the timed races, and a few others where the data is suspect. There are 283 races where I'm happy with the data. I've now analysed all of these and have the results as a ratio of the winning time.
Attachments
I've selected a few SOLers and analysed their results over the whole 283 period. I chose the top 10 of their first 15 races as the starting rating. If the next race is better than this starting rating, then it is increased by 10% of the difference. This has been done for each race. So you can see the races where your performance has been better than your rating.

Most of this process is automated, but there are a few manual stages that are time consuming. I'll need to investigate ways to automate these.

I'd appreciate ideas for what we'd like to see with this. For example, if we'd like to use 20% for long or popular races and 5% for short races.

We'll also need to see how we can host this, whether here or on a companion site.
Attachments
By the way, I know there are a few errors, for example the races are in numerical order not date order. This will be relatively easy to sort out.
azur top SOLer with 241 race finishes, legend
I've only included improvements in rating. We could also include decreases depending they fall within a certain range, for example within 10%. This would allow some decrease in rating but not due to cruising or starting late.
Another thought after looking at the starting rating. I've used the top 10 results in the first 15 races. This results in a high rating for some sailors. Indeed, some are 1 as they won 10 races in this period. This might be too high, especially if we do not include a decrease in future rating. Maybe we should only drop 1 or 2 races in this initial period.
I've updated the previous file to include all SOL members. I've only included the summary output as the full file size is now over 60mb.

I've also tried to work out a reasonable performance rating which is easier to understand than the handicap style rating. The formula PR=10/(1.01 - hcp rating) seems to work quite well. This is show on the attached page.

Remaining potential issues to resolve if we are happy with the way this is going:

1) Starting rating based on first 15 completed races with 5 drops. Should this be more/less races or more/less drops?
2) Improvement of 10% of the race result where better than existing rating. No decrease for any result lower than existing rating. Should this adjustment be more/less per race; vary for race type; vary for number/who racing against; include lower than existing (ie rating drops)?

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Garagiste's Test Lab

Welcome to Newport, RI, one of the great sailing centers of the world. This TIMED race takes us around Nantucket Island in RC 44s to celebrate the life of Capt. Bartholomew Gosnold who, among many other things in his short life, named Cape Cod for the teeming fish he encountered there, and Martha’s Vineyard for his daughter. This is a TIMEDrace so you may RE-REGISTER HEREto try again after finishing a run. You will have 13 days and 11 hours to test your skill and decision making after the race opens.
Race #1939
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Patricks Test

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Race #1935
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Nantucket Sprint 2025


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Race 1936
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Caravanserai
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Race #1700
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Please note the displayed course is provisional; the actual course will be set after the IRL course is announced at the skipper's briefing 48 hours before the start, and no later than 24 hours before the start.
Race #1561
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Race #1441
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RE-REGISTER HERE to race again after finishing a run.
Race #1444
INFO by brainaid.de
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Bimmer's Test Zone
What about a speedy X-362 380nm race in the waters off S America, just to blow cobwebs away!!
Race #1415
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Race starts: Dec 21st 16:00 Registration Open!

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Antarctica 3 of 3
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Race starts: Sep 16th 11:13 Registration Closed

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BLANK POLAR
Race starts: Feb 16th 00:00 Registration Open!

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