Questions tagged [elo]

Use when the question is ABOUT the Elo rating system not when it mentions Elo

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Chess.com ELO weirdness

I was rated 1140 in rapid, playing against an 1145. Chess.com said 8 points were at stake, so a win for should put me at 1148 and my opponent at 1137. I won and my ELO did become 1148, but my ...
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  • 237
2 votes
1 answer
91 views

How does a single player have 2 different FIDE accounts

When searched Yu, Yangyi you get 2 results. One is the top Chinese super GM. The other is an unrated player with Blitz rating 2544. Both have different Birth days according to FIDE but when I checked ...
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  • 573
10 votes
2 answers
3k views

How is it possible for a player without 2500 ELO to obtain the GM title?

I recently came across a GM who has a peak rating 2495 and has obtained the GM title after completing three norms. From my understanding, in order to become a GM one must Achieve a FIDE rating of ...
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  • 573
3 votes
1 answer
100 views

Why are unrated players counted as rated players in this FIDE rated event?

I came across this event where unrated players are also counted as rated players. Below you can see that every player has a rating of 1824 but when you view the tournament there are a lot of unrated ...
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  • 573
7 votes
1 answer
2k views

Elo disadvantage due to one pawn move in Indian Chess

In Indian chess, the pawn doesn't move two squares, however in the western chess, pawn can move two squares. Now, since the pawn can't move 2 in the Indian style, the fianchetto is a natural square to ...
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  • 197
2 votes
1 answer
97 views

An abstract Top 1 player rating vs time

How the highest Elo rating has been changing over time? Is there such an abstract data? Preferably FIDE rating. I've been trying to find a graph or a table, but all I can find is a list of peak ...
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  • 461
5 votes
1 answer
200 views

Distribution of Elo ratings

Danger! Only for math buffs! As we all know, Elo is Gaussian. In theory. Except it isn't. But my question is not about that distribution. Your Elo might also list a second number: the number of ...
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4 votes
1 answer
260 views

Rating system (glicko, elo, etc): is 'predict the outcome of games' the same thing as 'reduce the number of upsets'?

From Lichess page 'Chess rating systems': Question: Which rating system is best? Answer: The purpose of rating systems is to predict the outcome of games. Therefore, they can be objectively better ...
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4 votes
1 answer
254 views

Rating effect on no-show

In a long time control (90+30) team championship game I showed up on time but wrong city and lost the game - will this affect my rating? I arrived at the wrong location and missed the game.
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15 votes
2 answers
7k views

Why is Magnus Carlsen's Elo rating not higher, given that his win rate is so high?

Magnus Carlsen's Elo rating is about 2870, and according to this quora answer, he hasn't lost a game in 100 games at the time of writing. Assuming that his win rate hasn't changed since then, and ...
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  • 284
1 vote
3 answers
191 views

What sets the absolute value of players' Elo rating?

I understand that the way the Elo updating process works, if player A has a 66% chance of beating player B, then A's Elo rating will converge to be 100 higher than B, and so forth for 74%, ... etc. ...
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  • 284
-2 votes
1 answer
162 views

Why is 'Elo' sometimes capitalised to 'ELO'? [closed]

Why is 'Elo' as in Elo rating system sometimes capitalised to 'ELO' when it's a last name and not an acronym? I notice people don't say GLICKO, for example. Some (heavily downvoted) reddit posts: ...
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1 vote
1 answer
83 views

Why Aimchess rapid 2021 match results do not contribute to rapid ratings?

I used to check player ratings updates on https://2700chess.com/rapid which is usually promptly updated, often within few minutes from the match end (at least during the last FIDE world cup this was ...
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  • 121
0 votes
1 answer
174 views

What is the mean and standard deviation for men's and then women's standard FIDE ratings for those 2000 and above?

From this answer, the unconditional means and standard deviations are Female Mean = 1505, standard deviation = 339 Male Mean = 1675, standard deviation = 346 What about the case for ratings of 2000+ ? ...
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5 votes
1 answer
594 views

At what age do master level players (2200+) reach their peak?

We are surprised that players like Boris Gelfand and Vishy Anand can/could still play with the best in the world in their 40's and 50's. Are we right to be surprised? On average at what age do strong ...
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4 votes
1 answer
394 views

FIDE database used for calculating current ELO

Is there somewhere the database FIDE use for calculating ELO rating of players? No need for PGN of games just game result, date, and players. Reason: recalculate players rating by using Gliko, with ...
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2 votes
1 answer
124 views

Is it possible to measure play strength by analysing games of a player?

I am thinking on a way, most ideally on a software tool, what could get one of more games of a player, analise them, and gives an estimate on his play strength (as Elo/Glicko rating). Is it possible? ...
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8 votes
1 answer
258 views

Why do you see peaks on the elo distribution?

I was observing the elo distribution in Lichess and noticed peaks around rounded numbers elos ratings for medium to high rated players. This is consistent in Bullet, Blitz, Rapid games and not so much ...
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  • 345
6 votes
1 answer
579 views

Can a 2000 Elo rated player teach me middlegame play properly?

I have reached 2500 in the chess.com tactics trainer while I haven't study theory and my FIDE rating is 1637 (I reached 1930 in rapids a year in France). I want to study with a coach and there is one ...
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4 votes
1 answer
729 views

How many 2200+ FIDE rated players are there?

Are there any sources for the recent numbers of players rated over 2200 byFIDE?
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8 votes
4 answers
1k views

Why do women have a lower Elo requirement to obtaining (women) FIDE titles?

As well as FIDE norms, you need a certain Elo to obtain a certain title. Women need around 200 points lower Elo to obtain the analogous women's only title: Grandmaster (GM) 2500+ International master ...
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7 votes
2 answers
600 views

Why, in online chess, is it that the shorter the time control, the higher the world leading elo is?

I noticed on lichess.org that the shorter the time control, the higher the world-leading elo is. Is there a simple explanation for that? I also noticed that, in the meantime, the shorter the time ...
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  • 181
28 votes
5 answers
7k views

Are chess players getting better, given the same rating?

Chess ratings are a relative thing at a particular time, just like boxing. It is not absolute, compared to weightlifting for example, in which the records keep getting broken. How would say a 1700 ...
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  • 407
4 votes
4 answers
2k views

What's PlayMagnus age 10 Magnus' true elo?

I do realise that a similar question might have been asked before; however, all intel about the topic that I have managed to gather to date seems to be outdated: almost everywhere I search, it is said ...
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  • 151
2 votes
1 answer
115 views

How relevant is historical performance for Elo rating?

How far back are results of matches relevant for Elo purposes? If a player wins a few early matches then they will earn less points for later wins that if they'd lost those early matches. In the end ...
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  • 9,388
7 votes
3 answers
555 views

Historical motivation for the 1200-1800ish rating average

Although there is some variation in rating systems (in chess), most systems put the starting value and the mean of all users somewhere around 1500. Some pools are higher, some are lower, but most have ...
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  • 369
4 votes
2 answers
2k views

Lichess vs Chess.com ELO system and player strength

So I usually play on Lichess now a days while my friend plays on Chess.com. He keeps telling me that Chess.com is harder and has more players and more serious players, therefore the games are harder ...
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  • 830
2 votes
1 answer
272 views

limit stockfish 9 to a specific range of ELO rating

I am using stockfish 9 for our chess game project, and I want to limit the ELO rating of the engine to a range. I saw attributes like movetime and depth are used to limit the engine skill level, but I ...
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8 votes
3 answers
3k views

Elo distribution

In some online chess platforms you can see the Elo distribution of the players. It usually has Gaussian form. Is there somewhere where you can find the distribution of the classical Fide Elo?
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12 votes
4 answers
4k views

Are Elo Ratings Zero-Sum?

Are Elo ratings a zero-sum system in chess? In other words, if I gain +9 points from a game, does my opponent necessarily take a -9 point loss? If so, would it make sense to say that Elo points are a ...
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  • 139
6 votes
1 answer
751 views

Initial FIDE rating below floor, what happens?

I'm curious to know what happens in the following scenario: I play a Swiss tournament and meet 3 rated players, I score at least half point but do badly overall. Then I play another Swiss tournament ...
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  • 131
28 votes
8 answers
6k views

Would an ensemble of chess engines beat the best one?

In many areas such as prediction and classification, ensemble methods tend to outperform individual methods. This made me wonder if it would make sense to pick a few of the top chess engines and work ...
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4 votes
4 answers
253 views

Absolute strength and stability of Elo

Not sure how to phrase this... I am aware that Elo measures the relative strength of players. Let's assume for this question that there is such thing as an absolute strength in chess and that players ...
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  • 20.3k
4 votes
1 answer
742 views

By how much does being told what piece to move improve one's Elo?

Here is a (rather humorous) game in which a 900 player is told by a much higher rated player only which kind of piece to move (e.g. along the lines of "bishop", not "light square bishop"). Is it ...
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  • 1,751
6 votes
2 answers
18k views

Is there a list of approximate ELO ratings for each Stockfish level?

I want to create something that will select an appropriate Stockfish difficulty setting automatically given the player's rating. The straight Stockfish v11 that I've downloaded has 20 difficulty ...
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  • 69
7 votes
2 answers
2k views

Why does the FIDE rating table go beyond 400?

The FIDE rating regulations say: 8.5 Determining the rating change for a rated player 8.51 For each game played against a rated player, determine the difference in rating between the player and his ...
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5 votes
3 answers
1k views

How does Elo rating gain scale with games played?

I only take two players starting out at 1500 Elo and have them play against each other with one player winning all games. Also I leave out any artificially introduced cut-offs. So the winner is ...
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  • 20.3k
3 votes
1 answer
230 views

Online resource for estimating my elo rating using my games?

There are resourses that can estimate your elo rating such as this one. Usually I need to solve some puzzles and the system will give me an estimation of my elo rating. Here I have a different thought:...
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  • 7,705
5 votes
1 answer
515 views

The Evolution of the K-Factor

The change in Elo ratings depends, among other things, on the K-factor (or development coefficient). Current rules FIDE Rating Regulations effective from 1 July 2017 give the following values: K = ...
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  • 3,465
4 votes
1 answer
242 views

Equation for Handicap

Are there any sort of equations for how much of a handicap one should receive to make a game between two players with differing Elo ratings as balanced as possible? There might be a time equation to ...
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5 votes
3 answers
736 views

How long does it take for Elo rating to reflect changes in player's strength?

Suppose a player with ELO rating X has improved (for simplicity, without playing in tournaments) and she is now actually playing at the level X+N. How many games will it typically take for her rating ...
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  • 1,496
14 votes
5 answers
7k views

Why have engines not increased top rated chess players' Elo?

The arrival of strong chess engines as Stockfish, Houdini or Rybka allow top players to deeply prepare lines in openings or to study better endgames. I would expect a rating increase of top players. ...
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4 votes
2 answers
96 views

Creating program for finding top players with respect to elo and age

I want to create a program for personal use but also maybe for publishing it on the web, in order to detect the top players with respect to elo and age. There will be two cases: A) In this case, ...
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  • 373
5 votes
2 answers
1k views

I played my first (rapid) tournament recently and I wanted to calculate my ELO

According to FIDE regulations I should calculate the average of my opponents and just plug it here: https://ratings.fide.com/calculator_rp.phtml. I scored 5/9 but a couple of players didn't have ...
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2 votes
0 answers
78 views

Probability of winning based on Elo rating [duplicate]

I already looked on several websites but I have not been able to get a clear and thorough answer to this question: If player A has FIDE rating x and player B has FIDE rating y, how many times, on ...
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  • 283
7 votes
4 answers
824 views

Is there a low-end ELO Deflation?

I've heard often about Elo Inflation among the top chess players, meaning that a player rated 2650 Elo nowadays is weaker compared to a player rated 2650 Elo player 10 years ago. I'm curious if there'...
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  • 415
1 vote
3 answers
172 views

Establish Rating System for My Community

I want to establish a rating system for my community. I've decided to publish the rating every 1st January, April, July and October. Every new player will be given a rating of 1200. Using result ...
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  • 129
2 votes
0 answers
121 views

How much does time control affect ELO strength? [closed]

Suppose we cloned Magnus Carlsen and arranged a match between the clone and the real Magnus. I will give the real Magnus x minutes on his clock, and the clone will have y minutes. Is there any ...
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5 votes
1 answer
452 views

Story of unexpectedly high (400+) Elo rising in few months (reaching 2500 Elo mark)

I'm sorry for being vague, but that's exactly my problem: I can't find an online blog post of a German/Scandinavian master anymore which illustrated a case of a young boy from Eastern Europe who ...
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  • 415
2 votes
2 answers
353 views

Calculation of national rating

In order to calculate effect on national rating, should it be enough to choose the relevant k coefficient (assuming this is what makes for the discrepancy between national rating and FIDE rating) and ...
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