I'll just finish off on Visit first, before launching into the quagmire that is weight, although I seem to think I've popped up thoughts on this on numerous occasions previously and they must be festering somewhere buried in the TH archive. I would be lying if the 'copy' and 'paste' function didn't appeal to me
Visit I believe to be pretty much identical to Nahoohd to date, albeit slightly inferior. The same comments can be applied more or less to both horses. After she won at Ascot I gave her 82.58 (1.17 less) than Nahoohd's 83.75. In other words Nahoohd would be expected to win a race between them by a length and a neck, and duly beat her in the Lowther by 0.5L's. I was therefore a little bit wrong by a shade over half a length, but I'd normally consider that to be within the acceptable boundaries of error.
Right returning to EC's weight stuff;
Personally I don't change race times for weight, but will rank horses by equalising off a standard 9.0 on an all age Gp1 par, or rate them according to the terms that they're scheduled to oppose under by way of a forecast as to how they ought to perform.
Let me have a look at it bit by bit?
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I now tend to settle on race times with expected pars for each race type giving the race a rating rather than the individual horse..I seem to get far more consistent going allowances and the times stay more pure".
If I've read that right, then I do the same. I use the time the horse crosses the post in to set track variance, although I routinely omit the two slowest, and occasionally will react with a degree of flexibility if I think I've got a particularly dodgy card. It's been my experience that the methodology is normally pretty accurate, and a damn sight more so than any clerks, jockeys or trainers inane blatherings. I still maintain that the horse is the best judge of what the going is, as they haven't been corrupted by various pre-race reports or observations of weather systems and hence allowed these expectations to colour their judgement. Jockeys in particular tend to be sheep, and are particularly reluctant to raise a dissenting voice when asked for a comment for fear of looking silly if they expressed an opinion of kilter with the consensus. Indeed, some experiements were done in the 1950's about group conformity and the human condition that suggested that 40% of us will concur with a group opinion even if we believe it to be wrong, for fear of looking isolated.
It's half relevant, so what the hell, I'll describe it. A group of people were given a series of shapes to assess, and identify the biggest. The differences were subtle, but still discernable to a critical eye. The group was composed of a series of stooges and the individual who was under assessment. The person who was under assessment didn't know the others were planted and briefed to all give the same wrong, but plausible (the next nearest) answer. When it came to the last person to answer (the person being assessed) 40% of them agreed.
By the time a weatherman has reported rain, that a clerk has declared soft, that trainers have walked the course and agreed with the clerk, and a jockey is then asked to assess the going, what is he likely to say?
Now it's a fantastic edge to have (especially at festival meetings) if you can calculate the correct going, 15 minutes after racing. You can of course have a stab at doing after just one race, provided you're happy it was truly run. I know what I'd have asked Robert Thornton after the Arkle, when he too told punters it was 'soft'. :laughing:
"Robert, (me old china) your horse has just beaten standard time by 1.5L's, without even needing a 1.9 sec class par adjusment for a grade 1 novice chaser. Claisse is talking shite is he not?"
The moral is to ask the horse what the ground is I believe. You don't need special horse to human, human to horse voice translation software. All you need is a calculator and a bit of mathematical dexterity. The horse will tell you in most cases, and in most cases they'll be a damn sight more honest.
This final point is of course critical to any speed rating, as if you get the track variance wrong, then the foundation from which all your ratings are built on, are terminally flawed by the same amount. The only other way I know of doing this is through median times (as espoused by Dave Bellingham). I can see merits in both methods, and haven't conclusively decided which is the more reliable. I tend to prefer to use the winner, and adopt a position that if one horse was capable of riding the ground to that level, then that's what it's capable of being ridden to, and therefore that is what it is (KISS). Occasioanlly you find one horse that is just so far ahead of the others though that they corrupt a calculation single handedly. It's rare, and you can always spot it anyway, you just need to decide whether what you've identified is a wonder horse, or whether you've got a useful one in amongst turkeys?
In short therefore, I don't adjust a race time, but will adjust a rating in line with a scale of weight to distance, but only when it's appropriate. The relationship between how many a lengths a horse loses for increases in weight has been well documented previously on here, and it never fails to amuse me how many punters you over hear talking in terms of a rule of thumb 1Ib = 1L or 2Ib = 1L etc Wrong!!!
There's a very simple table, and it's not difficult to commit to memory and learn. It goes without saying that the longer one is expected to carry a burden (both time and distance) the more profound the impact of that weight will be on your capacity to sustain travel, at any given velocity above a certain level. There is also a point where a weight below a certain level, can be sustained without incurring any loss of performance provided it is light enough.
I tend to make weight adjustments therefore in compiling rank order hierarchies (just to give me a feel of where horse x sits alongside horse y) and if they are scheduled to meet, in which case I take into account the figure that they've run to, off what weight they did this, the distance over which they are due to meet, and of course, the conditions on which they meet. The issue of how weight increases effects performance is really quite straight forward. The issue of how a weight decreases effect performance I'm less than happy with (especially when dealing with progressive horses) and am in the process of develoiping my own hybrid scale.
One of the advantages of working in Oxford is I can often collar some decent physicists who strangely enough are normally very happy to translate their academic knowledge to horseracing for you (I think they think it gives them a shred of street cred to be indulging in something slightly prohibitive with a bit of a mischievous edge to it). The last time I was so indulged (and I frequently get lost half through such conversations) the whole business of what we know to be a "pull in the weights" was being called into question.
The crux of the matter seemed to revolve around how a 'pull' has been achieved. A horse like a car has a limited cubic capacity. Reducing weight doesn't speed it up in the same proportions that increasing weight, will slow it down. So it becomes important to legislate for how a pull has been achieved, as much as whether one exists
Mind you, as has also been pointed out, a horse like a boxer has a fighting weight that is likely to bring optimum performance. A trainer who has not got their horse fit (overweight) will have a lot more impact on it's chances than a handicapper raising it 3Ibs. Similarly, if it's too light, and hasn't got the fat reserves necessary to fuel its engine it will similarly empty when swithcing from anerobic to aerobic running. You will I fear need a biologist to explain why the same thing doesn't happen in marathon runners, but it certainly applies in aspects of other human endurance events (although this probably owes as much to extremem survival). In Hong Kong for instance they routinely weigh horses 24 hours before a race and publish the findings as a form item. This allows the punter to see how close a horse is to a previous weight when it was successful or otherwise.