why did my rating not change

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Avatar of 1Kingmidas1
I played someone comparable to me and upon me check mating them, their rating went down 69 points but my rating did not change.

This happened another time and I clicked off before realizing it. I thought perhaps I played someone with much higher rating. This time we were both around 1,100 rating on 10 minute game. After check mate, they dropped to 1,029 but my rating stayed at 1,085.

Normally when I play each game increases or decreases by 7 or 8 points depending if the rating is close. Just curious. Sorry if this has been asked before.
Avatar of 1Kingmidas1

Attached is a photo of another game where we were comparable rated and my opponent lost 67 points. In this game, I did however gain 8 points. I just do not understand why the great disparity in points when we are equally matched.

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Avatar of Martin_Stahl
1Kingmidas1 wrote:
I played someone comparable to me and upon me check mating them, their rating went down 69 points but my rating did not change.
This happened another time and I clicked off before realizing it. I thought perhaps I played someone with much higher rating. This time we were both around 1,100 rating on 10 minute game. After check mate, they dropped to 1,029 but my rating stayed at 1,085.
Normally when I play each game increases or decreases by 7 or 8 points depending if the rating is close. Just curious. Sorry if this has been asked before.

You only had one game where it looks like your rating didn't change today, but that was a loss, and due to a recent rating refund.

Avatar of 1Kingmidas1
That was from 2 days ago. The post today my rating did change but my opponent lost 67 points. I guess I am more curious why some people lose 60+ points on some games. We are equally matched. Just curious
Avatar of MrChatty
1Kingmidas1 wrote:
I guess I am more curious why some people lose 60+ points on some games.

That was the fifth rapid game for your opponent so the rating change was huge compared to players with stable ratings

Avatar of Martin_Stahl
1Kingmidas1 wrote:
That was from 2 days ago. The post today my rating did change but my opponent lost 67 points. I guess I am more curious why some people lose 60+ points on some games. We are equally matched. Just curious

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

What @MrChatty posted is correct. A deeper explanation is in that article.