Matchmaking Algorithm Issues

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EobardThawne001

Hi Chess.com Team,

I’ve been experiencing some frustrating issues with the matchmaking algorithm. While my opponents often have a similar Blitz rating to mine, their Rapid ratings are frequently twice as high. This discrepancy is evident in their gameplay, making matches feel unbalanced.

Additionally, I’ve noticed a pattern where I go on a 5+ game winning streak, only to then lose 5+ games in a row. This inconsistency is quite disheartening and makes me question the fairness of the matchmaking system.

Could you please look into this issue? It would greatly improve the overall experience for many players.

Thank you!

EobardThawne001

Another issue is with the game review feature. It often suggests that my Elo is between 1000-1200, while my actual Elo has never been above 580. This inconsistency is confusing and makes it hard to trust the feedback.

Martin_Stahl
EobardThawne001 wrote:

Hi Chess.com Team,

I’ve been experiencing some frustrating issues with the matchmaking algorithm. While my opponents often have a similar Blitz rating to mine, their Rapid ratings are frequently twice as high. This discrepancy is evident in their gameplay, making matches feel unbalanced.

Additionally, I’ve noticed a pattern where I go on a 5+ game winning streak, only to then lose 5+ games in a row. This inconsistency is quite disheartening and makes me question the fairness of the matchmaking system.

Could you please look into this issue? It would greatly improve the overall experience for many players.

Thank you!

Matchmaking only looks at the rating for the pool the game is in, not any other pools.

xtreme2020
If they’re your rating in blitz then they’re as good as you at blitz no matter their rapid rating
xtreme2020
And the estimated elo feature always goes high
Martin_Stahl
EobardThawne001 wrote:

Another issue is with the game review feature. It often suggests that my Elo is between 1000-1200, while my actual Elo has never been above 580. This inconsistency is confusing and makes it hard to trust the feedback.

That rating is an estimate and should be taken with a grain of salt. The system takes the ratings of both players and the associated accuracies to come up with the values. If you had the exact same game but change the player ratings, the estimates would be different.

EobardThawne001
Martin_Stahl wrote:
EobardThawne001 wrote:

Another issue is with the game review feature. It often suggests that my Elo is between 1000-1200, while my actual Elo has never been above 580. This inconsistency is confusing and makes it hard to trust the feedback.

That rating is an estimate and should be taken with a grain of salt. The system takes the ratings of both players and the associated accuracies to come up with the values. If you had the exact same game but change the player ratings, the estimates would be different.

Yeah, great! Add a system that is off by a factor of 2 and varies based on other factors. Really good! Couldn’t we just remove that? It’s exactly as I said: inconsistent and confusing.

Feels like I’m rolling a dice. It’s pure luck if I win or not. The same goes for the estimated ELO

AdamEr8

Regarding that "5+ game streaks" that make you question the fairness:
This is the Clustering Illusion, https://en.wikipedia.org/wiki/Clustering_illusionthis is just how probability works, even for fair coin flips.
Yes, it is counter-intuitive, but once you do the math you should be able to convince yourself otherwise.
Here's a question (you can ask ChatGPT for a detailed answer...):
If you flip a fair coin 100 times, what is the probability that the longest streak (of any kind) would be 5 or less?

kusayqazplm

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