Question Re: rating after match

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Avatar of saffachess

I played an opponent close to my rating, so +8/-8 on the match. I won, so +8 for me, but my opponent was -25! Can anyone explain why? Thanks in advance.

Avatar of Martin_Stahl
saffachess wrote:

I played an opponent close to my rating, so +8/-8 on the match. I won, so +8 for me, but my opponent was -25! Can anyone explain why? Thanks in advance.


Your opponent didn’t have many games, or many recent games, in the rating pool. The site uses the Glicko rating system that includes a measure of rating uncertainty called the rating deviation (RD) value. New players, or players with gaps in play will have a higher RD value, so they’ll see larger rating changes after games, until more games are played.

https://support.chess.com/en/articles/8566476-how-do-ratings-work-on-chess-com

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