I would like to use highpoint scoring for a season-long series, as well as to score a multihull fleet (using Portsmouth ratings) with a monohull fleet (using PHRF) for a regatta. One approach I am considering is the CHIPS highpoint scoring system. I've found some information (http://www.chipsteadsc.org.uk/chips/All%20about%20CHIPS.pdf) which gives a custom Sailwave formula for series scoring.
1) Does this formula work with the current Sailwave version? Has anyone used it?
2) Is it possible to use a custom Sailwave formula to assign points to boats based on the fleet size they competed in?
Thanks for your help.
Tom Tomlinson
Mayfield Yacht Club
CHIPS is indeed implemented in Sailwave and it is used by several
clubs around the world. I think your link refers to the original
CHIPS formula.
A close approximation to this formula is implemented within the
Sailwave program - you just have to specify High Point Scoring' under User Interface’ then you will see the CHIPS option under
Scoring System' / Race Scoring’
Apart from that, you can specify a formula for race scoring, but its
not easy to specify a formula as complex as CHIPS. A simple hps
formula is s-p+1 (starters, place)
···
regards,
Malcolm Osborne
Sedgefield South Africa
I would like to use highpoint scoring for a season-long
series, as well as to score a multihull fleet (using
Portsmouth ratings) with a monohull fleet (using PHRF) for
a regatta. One approach I am considering is the CHIPS
highpoint scoring system. I’ve found some information (http://www.chipsteadsc.org.uk/chips/All%20about%20CHIPS.pdf )
which gives a custom Sailwave formula for series scoring.
1) Does this formula work with the current Sailwave
version? Has anyone used it?
2) Is it possible to use a custom Sailwave formula to
assign points to boats based on the fleet size they
competed in?
Thanks for your help.
Tom Tomlinson
Mayfield Yacht Club
I believe that CHIPS is simply a straight-forward high-point system with a formula that assigns points for each race. Sailwave can definitely handle that (a version of CHIPS is actually built in also).
However, Sailwave cannot handle the more complex high-point systems where your final series score is either an average of your race scores or a percentage of the maximum possible race scores for the races you sailed in.
My club wanted to use the Percentage Point System (simple high point score for each race with your series score at the end being your total points divided by the total points if you had won every race you entered). This generates a kind of "efficiency" score at the end of the series. [We didn't use Sailwave and our program could handle the calculations.] But, the system is so complicated that we didn't think competitors would understand the system. So, we simplified it by generating an "efficiency" score for each race and then simply adding up the scores for every race. That way it is easy for a competitor to do their own calculations.
We have dubbed our system the "Sunset Scoring System" because our series is the "Sunset Series" (weeknights in the spring and summer). Each boat's score is basically the number of boats beat plus 1/2 divided by the number of boats that start in that race. Essentially, that gives a percentile ranking for each boat in a class. You can then multiply that percentile ranking by some fixed number of points. We use 9 so the resulting scores are all between 9 and 0. We then add 1 point for entering so scores for entered boats are between 10 and 1 with non-entered boats getting 0 points. We round points to 3 decimal places. The score at the end is simply the total for all races and Sailwave can readily do that.
The important thing about the Sunset system is that the middle boat in every class gets the same score regardless of class size (if you have an even number of boats then the two middle boats average to that score). Therefore, class size becomes strictly irrelevant. Systems like CHIPS give more weight to results in smaller classes (meaning that the middle boat in a small class gets more points than a middle boat in a larger class; and, the same for other places as well).
We use the following formula in the Sailwave high-point formula box:
1 + ((((s-p)+0.5)/s)*9)
In our formula "s" is the number of starters so as you can see it is easy to come up with your own custom formula based on class size. Under Setup>User interface check the box for High point scoring. Then go under Setup>Scoring systems choose your default system, choose Edit, and at the bottom of the Race scoring tab you'll see the boxes to enter formulas. Put your cursor over a box and an explanation window will pop up with some info on making formulas. There is also info in the help file but the cursor explanation seems better and more complete to me. The window won't stay long so just keep repeating until you can read the whole thing.
Art
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On 1/28/2012 8:24 AM, eagleshore wrote:
I would like to use highpoint scoring for a season-long series, as well as to score a multihull fleet (using Portsmouth ratings) with a monohull fleet (using PHRF) for a regatta. One approach I am considering is the CHIPS highpoint scoring system. I've found some information (http://www.chipsteadsc.org.uk/chips/All%20about%20CHIPS.pdf) which gives a custom Sailwave formula for series scoring.
1) Does this formula work with the current Sailwave version? Has anyone used it?
2) Is it possible to use a custom Sailwave formula to assign points to boats based on the fleet size they competed in?
Thanks for your help.
Tom Tomlinson
Mayfield Yacht Club
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Yes CHIPS is implemented in Sailwave using the fully optimised version of the formula - so called CHIPS3 - for which the rationale for its use and the mathematics are described in great detail in the paper you have already found on the Chipstead SC website.
The “All about CHIPS.pdf” file can also be found in the Files Areas of the Sailwave User Group at:
http://groups.yahoo.com/group/sailwave/files/
If you have not already noticed this, Chipstead SC publish all their results (of which there are a great many) simultaneously in both CHIPS and Low Point Scoring formats so that they can be compared (in two tables one under the other). Some classes/race series use CHIPS and other classes use LPS but both versions are always shown. A link to the 2011 completed series is here:
http://www.chipsteadsc.org.uk/results2011/results2011.asp
The club publishes their results on their website promptly every week and it is interesting to see how the 2 scoring systems compare as one progresses through the various series throughout the season (including winter). While it is true to say not everyone likes high point scoring systems, one of the key reasons for using CHIPS was that it provides a logical means of resolving ties which becomes particularly important for long series when a large number of discards may be allowed.
The Chipstead SC presentation format is not exactly the same as Sailwave since the club uses it own specifically tailored software but Sailwave nonetheless does provide CHIPS3 scoring…
(If either of the links don’t work then copy the URL into your address bar).
Geoff
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-----Original Message-----
From:
sailwave@yahoogroups.com [mailto:sailwave@yahoogroups.com] ** On Behalf Of** eagleshore
Sent: 28 January 2012 16:25
To:
sailwave@yahoogroups.com
Subject: [sailwave] CHIPS Highpoint Scoring in Sailwave
I would like to use highpoint scoring for a season-long series, as well as to score a multihull fleet (using Portsmouth ratings) with a monohull fleet (using PHRF) for a regatta. One approach I am considering is the CHIPS highpoint scoring system. I’ve found some information (http://www.chipsteadsc.org.uk/chips/All%20about%20CHIPS.pdf ) which gives a custom Sailwave formula for series scoring.
-
Does this formula work with the current Sailwave version? Has anyone used it?
-
Is it possible to use a custom Sailwave formula to assign points to boats based on the fleet size they competed in?
Thanks for your help.
Tom Tomlinson
Mayfield Yacht Club