Tpr

[justin13892002]

Just wondering if anybody can fill me in on how to "Manually" Calculate TPR? Thanks.

[Bill Lyster]

Justin:

First of all, I'm doing this from memory, and I think you can find this info in Pace Makes the Race and probably in several Followups in the Pace and Cap library

For sprints the starting point is 44.0 seconds for all distances. A 44 gets 100 points. Deduct 1 pt for every 5th slower than 44.0 So a 45 2nd call is 95; 100-5.

This is the Early Pace Rating or EPR

From second call to finish the "normal" times for each distance are:
(Time in 10ths)
5f 12.2 seconds
5.5f 18.6 seconds, these first two might be slightly off-see refs
6 25.0 seconds
6.5 31.6 seconds
7 38.0 seconds

If the horses time from 2nd call to finish equal these times, then they get an 85. If the horse lost the race you need to add beaten lengths to final time.

So, 110 final time losing by 5 lengths, where 2nd call was 45 and horse was 2 lengths back

Final time for horse is 111; 2nd call time is 45.4. Finish time is 25.6, so Final Fraction rating is 82 (25 less 3 lengths = 82)

This is the Late Pace Rating, LPR,

The Total Pace Rating or CPR (For composite rating in RDSS) = EPR+LPR =85+82 = 167.

There is an adjustment process based on Track Variant where 2/3rds of half of the deviation from TV=17 gets either deducted or added to the basic variant. Then 2/3rds of that number is adjusted into EPR and the other 3rd goes to LPR. IF TV = 11 or below 17, the adjustment is minus 3, half of 6 (17-11)/2; above 17, you add it to the two numbers. Some people like to cap the max when TV exceeds 24 (24-17)/2 = +1.75. Specifics to local your track might tell you what is best in this regard.


For Routes the EPR 100 value is assigned to a time of 1:09

Then for 8.0, the basis (85 value) for final fraction calcs is 26 seconds
for 8.5, 32.4 seconds
for 9.0, 39.0 seconds

So running on lead and winning a mile race at 110-136, EPR = 95: LPR = 85; TPR = 180. For this example no TV variation, so say TV=17.

The E/L Differential is just that 95-85 = +10; Subtract the LPR from EPR. If the number is negative, as in 85-95 then the TPR would be -10. You can model these by distance to great advantage.

Sorry this is rough, but its a quick and dirty answer to your question. Like I said, you can research library for more in depth answer or read the entire section of it in Pace Makes the Race.

Bill

[Houndog]

Attached in spreadsheet form. Notice the 2 tabs on bottom EPR and FFR. This might help with your calcualtions

[Bill Lyster]

Thanks for providing an updated EPR/FFR table Houndog. I was going to provide one as soon as I got home and you beat me to it.

Bill