OPR Formula

[Ed Law]

Originally Posted by EricH

Possibly. The hardest part about DPR is that a low blue_alliance_score could come from two possible sources. It could be that one or more red robots are playing really good defense. But, it could be that the blue alliance has a very low combined OPR (read: needs better offense even without defense being played). Without having an OPR-to-score comparison built in, there is no real way to determine whether red is playing good defense or blue is playing bad offense.

You might be able to do it with

red1+red2+red3 = blue_alliance_OPR - blue_alliance_score

and the higher the score the better (due to the OPR-score) but that involves knowing the blue alliance's combined OPR.

Numerically, DPR = OPR - CCWM (calculated contribution to winning margin). A team will have high DPR if their CCWM is low or negative comparing to OPR. Low DPR means a team is good in defense. Basically it means they do not allow their opponents to score much.
I do not agree with low DPR is a result of opposing alliance's inability to score. Over a number of matches, those teams with low OPRs will also cause other teams to experience the same thing. A team's DPR will only be higher or lower based on how they perform on average comparing to other teams. Remember OPR, DPR and CCWM are all calculations of that team's calculated contribution.