Why x2?

I think I have asked this before somewhere (long time ago). But anyway, why is the PL score the same as the number of pairings won times two? A percentage would make much more sense to me. Or just skipping the multiply with two part.

May be because of tie (exactly 50% APS) - in this case both bots get by 1 point.

Or 0.5 points without the multiplier.

I'm not sure, but i think, that it is you invented PL and you was inspired by English football Premier League. So you must understanding better rules of PL, than i, since i'm not football fan:)

Lolz. I remember that I was very supporting of the idea to measure how "undefeatable" a bot was. But I can't recall being the one to use the PL analogy. I do remember fighting fiercely for focusing on plain Average Percent Scores and not all that ELO hoochie coochie, but lost that argument back then. It feels like a glitch in the matrix when you remind me of the old PL discussions, because one of the first questions I had when "returning" to Robocode this time was "What is APS?". =)

Or, maybe, it was Pulsar. I'm sure, that it was European, but not Englishman and i think it was Swede. I saw conversation about it somewhere in old wiki, i think

I think it's very likely Darkcanuck just copied what was done on the old RoboRumble server, and I think the soccer (er, football) reference is accurate there. I guess I would also prefer to just see wins instead of (wins * 2). Not sure I've ever seen a tie anyway...