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Topic: Elo rating

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	Talk:ELO rating system - Wikipedia, the free encyclopedia
		The rating systems in place today are a political compromise between mathematicians who would like to estimate hypothetical parameters accurately and players who want each game to be a fight over the rating points they win and lose.
		Yes, the ELO system has certainly been used to measure the depth of games in the manner described by the paragraphs which were removed from the article.
		Elo system has theoretical underpinnings that make it a true statistical estimator, at least when K is set sufficiently low.
	en.wikipedia.org /wiki/Talk:ELO_rating_system (2339 words)

	ELO rating system - Wikipedia, the free encyclopedia
		The ELO rating system is a method for calculating the relative skill levels of players in two-player games such as chess and Go.
		ELO is often written in capital letters, but is not an acronym.
		ELO ranking for games without the possibility of draws (Go, Backgammon) is discussed in Go rating with ELO.
	en.wikipedia.org /wiki/ELO_rating_system (4014 words)

	SL Dueling Ladder - Information (Site not responding. Last check: 2007-11-05)
		It is important to understand that the provisional rating formula provides only a very rough estimate of where the dueler stands, and it is not until the dueler has competed several matches with an actual Elo rating that his or her rating can begin to converge on his abilities.
		Elo's recommended K-factors were 32 for regular chess players and 16 for masters (masters are high-rated chess players, and a lower K-factor simply means that they don't move in rating as much because they stand to gain or lose less); in actual implementation, the K-factors used were 30 and 10, respectively.
		Thus, as the dueler duels more matches, the provisional rating tax is steadily removed until the dueler reaches his or her tenth match, at which point the tax is completely removed and the dueler's displayed rating is the dueler's true provisional rating.
	www.skirmishleague.com /dl_info.asp (2871 words)

	ELO rating system
		Elo was a master-level chess player and an active participant in the United States Chess Federation from its founding in 1939.
		Elo's central assumption was that the chess "performance" of any given player in any given game would be a hypothetical normally distributed random variable, with a mean value that represented the player's true skill, and would change only slowly.
		Elo suggested scaling ratings so that a difference of 200 rating points would mean that the stronger player has an expected score of approximately 0.75, and the USCF initially aimed for an average club player to have a rating of 1500.
	usapedia.com /e/elo-rating-system.html (1388 words)

	GameKnot -- forum
		But I digress, when Elo says that the ratings are accurate to a 50 point range he is stating that a player with a current rating of 2500 has a 95% probability of having a playing strength that falls between 2450 and 2550.
		In particular the Elo rating system is not only not accurate, it is also not based on sound mathematical principles, it has never been published in a renowned mathematical journal and has never been peer-reviewed by a mathematician.
		Her new Elo rating will be 3000, when a conservative constant K of 10 is used (this constant is used for Grandmasters), and it will be 4000 if a more "realistic" constant K of 20 is used.
	gameknot.com /fmsg/chess3/1836.shtml (4614 words)

	Bonzini USA Tournament Ranking & Rating System
		Their initial point rating (for use by the ratings formula) is the “average” value for the ranking’s point scale range, since it’s not feasible to accurately “estimate” where in the ranking classifications point range a player might be (estimating the ranking level alone is difficult enough).
		The ratings systems may not be identical (although they might be based on the same principles), the rating pools (the player base in the systems) may differ, and the matches may have been played under different conditions.
		That means that ratings are not re-evaluated after each match, and the “new” ratings are computed/adjusted from the “old” ones adding all points he gained/lost from the matches the player completed at any tournament(s) since the previous publishing date.
	www.bonziniusa.com /foosball/tournament/TournamentRankingSystem.html (6601 words)

	Introduction (Site not responding. Last check: 2007-11-05)
		A rating system is an attempt to quantitatively represent the strengths of individuals engaging in a competitive activity.
		In the rating system I am using, the ratings are not an absolute (or ratio) scale; only the differences between ratings are informative.
		For example, the ratings of NCAA women's teams are not comparable to ratings of NCAA men's teams, although the distribution of ratings within each group is informative about the range of strengths within the rating pools.
	www.reed.edu /~jones/ratings/node1.html (216 words)

	Steven Radack (Site not responding. Last check: 2007-11-05)
		Ratings for players are calculated based on who won the game and what the respective ratings of the players were before the game completed.
		The Elo rating system tries to predict the probability that a given player will beat another player based on their ratings.
		By the way, the 400 is used to fit the ratings along a normal distribution curve desired for chess ratings.
	www.stevenradack.com (625 words)

	World Football Elo Ratings: Rating System
		The World Football Elo Ratings are based on the Elo rating system, developed by Dr. Arpad Elo.
		Ratings tend to converge on a team's true strength relative to its competitors after about 30 matches.
		Ratings for teams with fewer than 30 matches should be considered provisional.
	www.eloratings.net /system.html (326 words)

	Go Rating (Site not responding. Last check: 2007-11-05)
		A work on the new rating code is in progress and once we switch to it the 1996 tournaments will be re-included.
		However, the player's rating is kept in the database of players and it is used once he/she appears again at any tournament in the future.
		It means that the ratings are not reevaluated after each game (round) and the "new" ratings are computed from the "old" ones adding all contributions from the games the player completed at a given tournament.
	www.european-go.org /rating/gormain.asp (1435 words)

	[E4EC] Stories
		An ELO rating is the result of statistical calculations designed to measure the playing strength of players.
		The ELO system is in almost universal use and has been further refined by others, notably Glicko, but is still named after its creator.
		In devising the ELO scale, some premises were used that are worthy of note.
	www.e4ec.org /stories.html?id=5 (435 words)

	The Automated Chess Rating Utility (Site not responding. Last check: 2007-11-05)
		Use this test to get an estimate of your Elo rating: study each diagram for no more than five minutes, then input your move.
		This will hopefully yield the most precise estimate of your Elo rating.
		Send me your USCF/FIDE/whatever Elo rating (the most "official" you have) along with the output you got from the test.
	home.fnal.gov /~dorigo/rating.html (265 words)

	Sauceda Rating System Description (Site not responding. Last check: 2007-11-05)
		This rating system is based on the Elo rating formula for chess.
		where Rn is the new rating, Ro is the original rating, and K is an constant that determines the speed of convergence.
		The published ratings also include a homefield correction variable that likewise reaches an equilibrium.
	www.mratings.com /theory/sauceda.htm (407 words)

	The Telegraph - Calcutta (Site not responding. Last check: 2007-11-05)
		Anand also spoke in favour of a revision in the rating procedure, while adding he is willing to represent India in the Chess Olympiad next year.
		Anand, who is trying to develop his knowledge in astronomy as a second hobby apart from his interest in wildlife, refused to agree that the recent splurge in the number of GM norms and titles are not the right indicator of a player’s true strength.
		For example, somebody rated at 2600 now is not as strong a player as somebody with that rating nine years ago.
	www.telegraphindia.com /1031221/asp/sports/story_2702885.asp (566 words)

	The CXR Rating System (Site not responding. Last check: 2007-11-05)
		But the ratings -- which are central to the CXR System -- are a variant of the widely-used system developed by Professor Arpad Elo (the so-called "ELO ratings").
		The initial rating of a player is the responsibility of the authorized official of the league, team, or club.
		If the player has no established rating but has a provisional rating from the aforementioned organizations, then that will be accepted as the initial CXR rating for the player, but it will be regarded as a provisional rating.
	www.chess-express.com /explain2003.html (1329 words)

	ChessBase.com - Chess News - Arpad Emre Elo — 100th anniversary (Site not responding. Last check: 2007-11-05)
		Elo was a strong chess player (two draws against Rueben Fine!) and a physicist.
		He used rating numbers that were similar to those players were using at the time, so that people would not have to get used to completely different numbers.
		The measurement of the rating of an individual might well be compared with the measurement of the position of a cork bobbing up and down on the surface of agitated water with a yard stick tied to a rope and which is swaying in the wind."
	www.chessbase.com /newsdetail.asp?newsid=1160 (680 words)

	Bayesian Elo Rating
		The problem of Elo evaluation consists in estimating the Elo rating of a set of players, from the observation of results of their games.
		The fundamental Elo formula can be reversed to obtain an estimation of the rating difference between two players, as a function of the average score.
		Iterative method to solve a fixed-point equation, so that the rating of every player is in accordance to the reverse Elo formula, assuming an expected result equal to the average score, against an opponent whose Elo is equal to the average opponent.
	remi.coulom.free.fr /Bayesian-Elo (904 words)

	New Page
		The rating during the provisional period is the average of a set of values, one for each game played.
		Extra points are then added to the rating for the purpose of keeping the average rating of all established active players close to 1650.
		Another thing to note with that is that the ICC ratings used for each player was an average of their rating tested three times over a two month period, with no less than ten days between tests.
	www.gtryfon.demon.co.uk /bcc/Java/gradingintro.htm (3116 words)

	Elo rating vs. winning probabilities (Site not responding. Last check: 2007-11-05)
		This table shows the correlation between the difference in Elo points and the probability of winning a game (in bold).
		So for example if a player has won 60% of her games against an opponent, she would be approximately 72 Elo points stronger.
		Conversely, a player that is 150 points weaker than his opponent, has only a 30% chance of winning a game.
	www.ascotti.org /programming/chess/elo.htm (63 words)

	Help file (Site not responding. Last check: 2007-11-05)
		The conversion formulas are: USCF = ELO + 100 BCF = (ELO - 600)/8 BCF ratings are the official ratings of the British Chess Federation.
		USCF ratings are the official ratings of the United States Chess Federation.
		There is no exact way at present to convert server ratings into equivalent official ratings.
	www.freechess.org /WWWhelp/convert_elo.html (91 words)

	The First Chess Rating Lists
		Professor Elo made significant modifications and improvements to the existing rating system, but what he did was mathematically trivial, something which any average graduate student of mathematics or statistics could have done with the data already available from the existing rating system.
		The basics of the rating system was that if you achieved an even score in a tournament, your performance rating was the rating of your average opponent.
		Throughout this period, a player rated over 2700 was called a grandmaster, as player rated over 2500 was a senior master, a player over 2300 was a master and a player over 2100 was an expert.
	www.ishipress.com /ratings.htm (1388 words)

	Ace Point Club in NYC - Backgammon, Chess, Cards
		ELO is based on math and can be used to give a good estimate of the probability of a certain level player beating another.
		ELO is based on a weighted-average of opponents a player has played.
		The rating approach is based on work done by Professor ELO, who originally developed this approach for Chess.
	www.acepointclub.com /tourneys/ratings/rating_info.htm (452 words)

	iSnooker's Ranking system (Site not responding. Last check: 2007-11-05)
		The ELO rating system as developed by Prof.
		Arpad Elo is simple, tested (by the international Chess Federation the FIDE).
		The structure of the ELO system is mathematically very simple; it uses a table and a formula:
	www.thesnookerclub.com /elorank.htm (262 words)

	[No title] (Site not responding. Last check: 2007-11-05)
		In view of several constructive comments which have helped to point out those aspects of my posted proof which were difficult to follow (as well as one typo), let me make the following attempt to restate the theorem and proof in terms that (almost?) everyone can accept.
		Each player has a rating which is a real number; 2.
		Then, for each of the first N wins, Player A's rating X is less than RT, so Player A gains at least G(2RT-RA-RB) rating* points for that win.
	www.desjardins.org /david/ratings.txt (309 words)

	[No title]
		If you did not have an"established" Elõ rating before, your SPs will have risen by more than your Elõ rating to reflect the greater confidence in the accuracy of your Elõ rating now that you have played more tournament games - so newer players' SPs may rise even if their Elõ rating has fallen.
		If you are outside the top 30 or so, to see whether or not your rating has improved it is best to look at how your rating has changed rather than your position.
		This is because the constant influx of completely new players and newish players (whose seeding deductions disappear as they play more tournaments and their Elõ rating becomes established) may drop you down the table even if your rating stays the same.
	tournaments.tantrix.co.uk /ratings/seed01.shtml (463 words)

	Universal Warlords Wars (Site not responding. Last check: 2007-11-05)
		The Elo rating system (named after it's developer Dr. Arpad Elo) is a numerical system in which differences in rating may be converted into scoring or winning probabilities and vice versa.
		The normal probability function (shown below) is derived from the normal distribution function, and this function determines the differences in ratings based on match results, or the expected match scores based on known rating differences.
		The coefficient K determines the relative weight given to the pre-event rating and the event performance rating.
	lord.o2.kz /eng/rating2.htm (449 words)

	Rebel Century Online Manual: Elo rating (Site not responding. Last check: 2007-11-05)
		With this data, Rebel calculates an estimated ELO rating which can be found in Options.
		The system used by Rebel is of course not reliable to an exact ELO rating, however the goal of the system is more than sufficient.
		The ELO values used by Rebel are based on the FIDE standards.
	www.rebel.nl /man-htm/004003014.html (224 words)

	GoBase.org - Introduction to the Elo Rating System
		Arpad Elo is simple, tested (by the international Chess Federation the FIDE) and easily adoptable to Go tournaments.
		The maximum drop/raise in rating per game is C. The ELO system has two parameters which affect the dynamics of the system: the constant
		For Chess, the variance of the Normal Probability Function is set at 200 ELO points and the constant C depends on the rating of the players involved.
	gobase.org /studying/articles/elo (403 words)

	rediff.com: Koneru Humpy secures highest ELO rating
		Incidentally, Humpy is also the first Indian girl to have an Elo rating of 2,464.
		She is ranked 43rd with 2405 Elo points.
		Anand, who will be defending his crown next month, has 2770 Elo rating points behind Russians Garry Kasparov and Vladimir Kramnik.
	www.rediff.com /sports/2001/oct/04humpy.htm (313 words)

	GameKnot: Elo rating
		F.A.Q. GameKnot player ratings are calculated using the classic Elo formula with fixed K = 20.
		Team ratings are also based on Elo rating system.
		GameKnot switched to using Elo rating system in October 2003.
	gameknot.com /elo_rating.pl (53 words)

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