Thanks Dylan. I think I'll insert a Daffy quote here . "The older I get the better I was"

1) All non-private and non-anonymous windsurfing tracks are scored. Tracks that are hidden or private, aren't used in working out scores. (but anonymous ones are.)
2) For a location to be considered usable for score purposes, there must have been a few different people that sailed there. I think I've pegged it at about six at the moment, but it could be more or less in the future.
3) For each location, an average and standard deviation over all time are calculated for each of the seven standard divisions on ka72.
4) For each of your tracks at one of those locations, a standardised score is generated based on the mean and SD generated in step 3. This may be a positive number (when you sail better than average) or a negative number (when you sail worse than average.)
5) Your top ten standardised scores in each division (for the year) are then used to determine your overall sailor score using a secret magic formula.
6) If you don't have ten tracks yet, then your score for the remainder will be 0 (or average.)

Problems I am dealing with:
a) If a location changes in difficulty over time (building up a sandbank, or eroding one away, for example) this is not accounted for.
b) Rule 6 above means that good sailors will start the season with a median score that will go up. Poor sailors will also start with a median score that will then go down as their first ten tracks are loaded, before rising again. This probably isn't the most motivating approach. Any ideas?
c) People that mostly sail at one location where nobody else sails won't be able to generate a score until they sail somewhere else too. If you are the only person on your beach, comparison becomes meaningless.

One interesting side-effect of this system is that it could be advantageous for a strong sailor to post all their weakest tracks at a location, in order to bring down the average speed at that location and thereby boost their score. I know some people don't like posting their dud tracks, but this compensates them.

The spot rating is a top idea to "level the playing field".
A separate rating for ladies would be desirable but then you would need to collect more data.

I've identified a number of tracks that have slipped through the net in terms of sailor score. They are being gradually reprocessed, and this may affect some sailor scores (and PBs) over the next few days.

Data quality improves all the time. If you are missing PBs or think your score is weird, feel free to email or PM me and I'll look into it. [email protected]

It takes at least ten sessions in a year to start to build a reasonable score, so don't despair.

It's not based on your best track for the year, but your best ten tracks for the year (or more precisely, your best ten results - adjusted for the location you got them at - in each division for the year.) The score should also account for the different conditions you are sailing in, once you build up a set of tracks for the year.

But enjoy taking a look. I'm taking a breather from it for a few weeks to focus on my day job and most near-term work will be fixing stuff that's there but not working right.