500 YDS = 457.2 Metres times don't seem correct to me, seems a few seconds out
About rating Greyhounds
- Thread starter The Hare
- Start date
Haven't been to owlerton(sheffield) for many years, know very little about the sport oyher than what i heard from people who knew what they were doing.
Sort of things i listened for was to ignore the numbers in the racecard...."they were made up", "best judge on the track ? the HARE-DRIVER".
The main bookie on there was BOB HOLMES, he knew very little about greyhounds or horseracing but told me his son was the best judge on the track (owlerton), Bob passed away about 8 yrs ago so the lads now run the businesses.
If i was to try and get involved with dog racing in any real sense i'd concentrate on just one track, watch every race over and over with has much information about times as possible.
TECH...Do they still use Beams for each lane to the first bend ?
TRACK BIAS,...Does it still exist ?
Hi Tacker, as long as there are replays, you can clock each and every dog down to about =/- .015 , Yes the Hare driver can play a big part of race, from the start to the finish in aus there are a lot stricter controls on the speed at trip , the time to trip etc, the distance in front and big variance and they dont last long
is there a way of accessing replays, i know utube shows trials.
TheBluesBrother
Dam
Back in the 70s, I used to go to Hackney dog track (Waterden Road) most Saturdays to watch the greyhounds; if I remember right, it was an eight-race card, and then I'd attend Len Silver's speedway training school in the afternoon.
In the 90s, I was system admin for Swindon greyhounds, which was useful as I got a free speedway season pass.
Mike.
Maybe this works ?
we get the majority of the UK greyhounds on Skyracing or TAB
All the distances are already in metres here for greyhound racing. Still getting to grips with it, the par times if wrong shouldn’t be that far out, would be surprised if any of them were more than 0.1 seconds wrong. That said I saw the data for the first time a few days ago so could be getting it all wrong.
ok 500m tha now makes sense the reciprocal 28.15/500 = .0563
Greyhound Topaz API (Python) - The Automation Hub here is a good page at Betfair with some videos and resources
TheBluesBrother
Dam
O
Outlander
What calculation did you use to compile your par times?
Would the 10th percentile of the data work for 100 races?
A Fraction of a "Length": In greyhound racing, the physical distance between dogs at the finish line is measured in "lengths" (the body length of a greyhound). On a standard racecard, this distance is converted into time. One body length is roughly equivalent to 0.07 to 0.08 seconds.
Mike.
What calculation did you use to compile your par times?
Would the 10th percentile of the data work for 100 races?
A Fraction of a "Length": In greyhound racing, the physical distance between dogs at the finish line is measured in "lengths" (the body length of a greyhound). On a standard racecard, this distance is converted into time. One body length is roughly equivalent to 0.07 to 0.08 seconds.
Mike.
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Honest truth is I got python to look at this calculator on this website Greyhound Stats UK, I got chat gpt to write me a script to get the times for each CD to get 100 rating, since i didn’t have a clue, since that I have used iteration and AI to calibrate the ratings from each track. I really am a beginner so I needed help initially. These ratings I put up yesterday were derived from the website calculator, I have moved on from that now, I still have no idea what I’m doing but trying to develop it with knowledge from horse racing
I’m only interested in the times, not the distances , the idea is can I get a benchmark of greyhound ability initially using the website standard times for 100 and the official going and then use my rating method to iterate and smooth the going allowance and standards, I have made progress it would be nice if there was an official rating for greyhounds so I could check my ratings were in some kind of sensible order because I don’t know what greyhounds are the supposed to be the best.
Then if I get accurate ratings my issue will be still clueless on how to get the best out of them re greyhounds., will update with progress for anyone interested, atm I’m dealing with a results updating issue.
I would use the top 25% as a starter for one track that is not winners but times , then take those dogs and see what times they ran at another track, and see what percentile they sit, then reverse using a different cohort at track B and see what they run at track A. I always use a track constant distance multiplied by the Par time so to speak so if Towcester is 500m and the Par time is 28.0 multiplied = 14000 so any time is just divided into the TC and you can see the metres differences adjusted correctly for speed. example runner ran 28.40 14000/28.40 = 492.95 metres 7.042 metres difference if you use the standard (T/t)^(d/1000)-.9)*1000 you start introducing a compression or elongation one way or the other even though it's miniscule
the bigger issue if they use margin to determine the other finishers time, you need to start adjusting using the reciprocal otherwise the also rans are going to be penalised , maybe you need to setup a column so you know how the times are fitted, cause some tracks might be doing timing right thru the also ran finishers
ok, point taken, just I saw the 270m tow and 500m Tow with the same going allowance, that's a simple correction When I look at your sheet, you need a 100 for each track not 5 or so, if the times are not actual for placegetters you will need to stick with winners only until you can get a correction helper column going
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I appreciate your help, if I ever get anything properly started you will be my first port of call for advice on improvements.
eeyore
Filly
in the late Eighties was give a book by Liam Connolly called Greyhound Racing for profit where he show you make a time index for most tracks hackney in his opinion was the fair track of the all so i made a index for that had my success and loss but then packed up doing them in the nineties as working life to over just no time at all been given a lot weird and simple systems to try also collected the lot out of the Handicap book i wonder if the sporting chronicle had some systems sent in for greyhounds Jackform would be the man to Know also had a few from Australia then you had to try to adapt to english tracks and to finish off i started to work with them they were happy days do not do much now just some football at weekends