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Author Topic: Rating not updating?  (Read 1717 times)

Offline Ingix

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Re: Rating not updating?
« Reply #30 on: 19 May 2020, 09:41:25 AM »
Your observation is right.

Glicko-2, the rating system used, is still based on a ratings period (of one day for Dominion) and all the games during that rating period are processed "at the same time" (meaning it doesn't matter for your next rating in which order you played your rated games in the ratings period).

Before the ratings update, what was shown in the game client was your calculated rating during the last update, so basically your rating from last European midnight.

After the ratings update, what is shown in the client is the answer to the question: "If you don't play any more rated games during this ratings period, what will your rating be at the next update?"

That explains your observation. You play some games on day X and the client will show you what your rating will be at the ratings update between day X and day X+1. For me some days ago that was 49.51, so I got a "50" in the list.

Then, during that ratings update between day X and day X+1, my rating to be used for day X+1 was calculated as 49.51. But when I looked at my rating the next morning, it was 49.49. That's because I hadn't played a games that day yet, and the client told me what my rating would be if I didn't play any rated games this day. Naturally, it would decrease a bit.

I understand that players want to know "What is my rating right now?" Unfortunaetly, that concept doesn't exist for Glicko-2. You only have ratings at the end of ratings periods. Before the ratings update, that was what was shown, your rating at the last update. Now, what is shown is your rating at the next update, as predicted under the assumption that you don't play more games until that time.

Offline Gold Subscrptn Chick

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Re: Rating not updating?
« Reply #31 on: 20 May 2020, 12:35:00 AM »
Your observation is right.

Glicko-2, the rating system used, is still based on a ratings period (of one day for Dominion) and all the games during that rating period are processed "at the same time" (meaning it doesn't matter for your next rating in which order you played your rated games in the ratings period).

Before the ratings update, what was shown in the game client was your calculated rating during the last update, so basically your rating from last European midnight.

After the ratings update, what is shown in the client is the answer to the question: "If you don't play any more rated games during this ratings period, what will your rating be at the next update?"

That explains your observation. You play some games on day X and the client will show you what your rating will be at the ratings update between day X and day X+1. For me some days ago that was 49.51, so I got a "50" in the list.

Then, during that ratings update between day X and day X+1, my rating to be used for day X+1 was calculated as 49.51. But when I looked at my rating the next morning, it was 49.49. That's because I hadn't played a games that day yet, and the client told me what my rating would be if I didn't play any rated games this day. Naturally, it would decrease a bit.

I understand that players want to know "What is my rating right now?" Unfortunaetly, that concept doesn't exist for Glicko-2. You only have ratings at the end of ratings periods. Before the ratings update, that was what was shown, your rating at the last update. Now, what is shown is your rating at the next update, as predicted under the assumption that you don't play more games until that time.

I'm slightly confused by the above. The ratings are updating after every game it seems. So there's an additional daily update on top of the post-every-game updates?

Offline Ingix

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Re: Rating not updating?
« Reply #32 on: 20 May 2020, 09:10:52 AM »
As I said: The "real" ratings update happens still once at midnight UTC. It will take into account all the games you played during the last time that update was made (so usually the last 24h). That didn't change principally, but the method used is now much faster and has less strain on the servers which in parallel needs to handle the games going on at that time and the results coming in.

What you see in the updated rating is a "preview": This is what your rating will be during the next midnight ratings update under the assumption you don't play more games.

So before the big ratings overhaul, you were shown the "past", your rating from the last update. Now you are shown the "future" (your rating from the next update) which has certain uncertainties, of course.