Can somebody help me understand something here please.
I have been looking at the cards for the forthcoming Group 1’s.
Using the Irish Derby entrants Carlton House and Native Khan as examples, Carlton House has a RPR showing as 135 and Native Khan showing as 132.
The best RPR’s these 2 colts have been awarded after racing is 121 and 118, both acheived in the Epsom Derby.
My question is how are the 135 and 132 for the future race arrived at?