I found an interesting post on GTPlanet re DR calculation...does anybody know anything further?
I'm a bit of a numbers person (so have been an accountant since school) and take great interest in this stuff.
https://www.gtplanet.net/forum/thre...-cars-feedback-requests-updates.362085/page-7
I've managed to crack the DR calc code
It isn't using quite the
Elo equations, instead it uses a simpler linear equation similar to
Sonos. I'm not sure how we should name it - it is still somewhat Elo-based, and that's probably accurate enough for most purposes.
For each pair of players it calculates the point gain for the winner of the pair as (DRloser - DRwinner) / 500 + 80, rounded down to the nearest integer. The loser of the pair will lose the same number of points. The final DR change for a player is the sum of their gains/losses against each other player.
It's possible that there's a limit (of 40000?) placed on the DR difference (DRloser - DRwinner) to ensure that the winner of the pair doesn't lose points, but I haven't seen an example of such a big difference yet.
The spreadsheet doesn't yet attempt to include any of the boosts/drops when changing DR level, any limiting within the range 1 .. 75000, or any other special cases like that. It does include handling DNF vs DNF scoring as 0 though.
Click to expand...