Holty10
Colt

I wondered that too. I've used their figures before. It seems to me it would be a very tough thing to work out manually.
Maybe pos in the odds market v finishing position?
Sounds like a lot of manual checking though!
JIB used the Average OR of the First 5 in the Betting non Handicaps and the Average OR of the first 6 in the betting Handicaps, to arrive at the Class of Race and then applied his formula to distance beaten.
Chesham can you please tell in what edition book he explained the above method .would like to read up on it.
thanks tonytench
The camera info - in your post - I have never read that before - very goodJust to clear a few things up, when horses are described as being beaten X Lengths, it is not the actual length of a racehorse. The Lengths are a measurement of time. The Photo Finish Equipment works out the Lengths beaten by the time interval between horses. If the Going is soft or heavy then the Photo Finish Equipment is calibrated to adjust the time frame interval Lengths beaten.
Extract from a post that I read on a Forum that I belonged to.
There is still no standard definition of a length for any age horse but it is quite easy to solve this problem for any age horse. The judge sets his photo-finish camera frames per second speed to suit the expected finish speed. If the horses run slower then on the photo-finish strip they look elongated, if faster they look shorter. Their height does not change = so all the judge has to do is compare the ratio of apparent length to height with a ruler and he can then see immediately what camera speed should have been used to obtain a perfect horse picture. So, if original setting was 5 and they appeared to be shorter by a 1.2 factor then the real finish speed is 5 x 1.2 = 6.0 lengthsper second.
Of course, beatenlengths are a minefield of misinformation, as 2 horses will be closer or farther apart due to the pace of the race. Also, the handicapper has no knowledge of the various horse body weights from which he is adding or taking weight.