Massive rerate of USCF history database caused rating loss

So he played, before the 2010s, in 1986, where the rating list has him at 2110, according to MSA, he pulled a 2100 rating with no provisional and came back to playing, the existing rating gave him his floor before, but the first tournament back he dropped under 2100.

MSA shows 2100, from his previous rating

Yeah, but I don’t see a 2100 post-event rating for him. Apparently he lapsed, but came back in 2018.

We’re researching this one in the printed ratings supplements, if there’s a record of a 2100+ post-event rating there, we’ll make sure his floor gets updated, but that might take a few days.

Well he started playing after the gap between 1986-2012 he started playing again, not sure where you’re seeing 2018, has been consistent between 2012-present in playing. The main reason besides the discrepancy that I bring this whole thing up is that being such a prolific AZ player, many ratings had been impacted

We need someone at the office to research his pre-2018 history in the rating supplement books, my guess his ID is one of the ones that got purged in the 80’s or 90’s due to inactivity.

If he has a published 2100 rating from back then, clearly he needs a 1900 floor.

This is probably not the biggest issue on the staff’s plate at the moment, because once we get a floor in place, a rerate will solve any issues.

There are likely to be additional cases like that, because the old program was probably a bit more flexible in finding old floors.

We’ll make sure the membership department knows how to clean these up as they are discovered. We’re planning to run the first rerate on MUIR soon, that may uncover several of these issues,.

Mike Nolan

May I resurrect my intermediate question? Sorry to pollute the main point here. After a March 2025 event, I reached a new high rating which then increased from the 2025 bonus recalculation. That new rating is correct in the crosstable

image

But it isn’t correct as my highest rating on the graph is the pre-bonus update. Why is that? Doesn’t much matter to me since it’s the same floor but players might not like it if their floor was set from 1899, not 1901

That’s because the graphs on MUIR are showing published ratings not post-event ratings. Unless a peak also happened to coincide with a supplement cutoff, the peaks aren’t on those graphs.

Updating the graphs to use either published ratings or post-event ratings is on the task list as a post-launch enhancement, but I do not know when it is likely to be approved, worked into the budget, and worked on.

Thanks, Mike. Appreciate all your triage work.