<Comment deleted by user>
Nope there are no measures for this kind of thing.
Yep, this is a perfectly plausible scenario other than the fact that the player would have to win every game. A pretty decent example is the following FIDE rating graph: ratings.fide.com/id.phtml?event=2070901
<Comment deleted by user>
How about someone at FIDE reviews the monthly changes and has a warning triggered by anyone whose rating grows by more than 400 points, so that he can check if it's legit (= new rating ~ performance).
If not legit (as in your trick), then how about, for this particular person, they compute the rating change as if the games had occured in two separate months ? Then the first 3 tourneys tourneys bring Hero to 2200ish with his high K, then everything adapts to the new rating, and the next 3 tourneys bring him closer to his true level (or provide minimal gains if he truly won everything).
That all sounds pretty reasonable for FIDE to do, with little effort.
(Also I would like to meet this guy who will play OTB chess non stop for a month in order to game a rankings algorithm.)
If not legit (as in your trick), then how about, for this particular person, they compute the rating change as if the games had occured in two separate months ? Then the first 3 tourneys tourneys bring Hero to 2200ish with his high K, then everything adapts to the new rating, and the next 3 tourneys bring him closer to his true level (or provide minimal gains if he truly won everything).
That all sounds pretty reasonable for FIDE to do, with little effort.
(Also I would like to meet this guy who will play OTB chess non stop for a month in order to game a rankings algorithm.)
I found the FIDE rating regulations here: http://www.fide.com/fide/handbook.html?id=172&view=article
8.
The working of the FIDE Rating System
The FIDE Rating system is a numerical system in which fractional scores are converted to rating differences and vice versa. Its function is to produce scientific measurement information of the best statistical quality.
8.1
The rating scale is an arbitrary one with a class interval set at 200 points. The tables that follow show the conversion of fractional score 'p' into rating difference 'dp'. For a zero or 1.0 score dp is necessarily indeterminate but is shown notionally as 800. The second table shows conversion of difference in rating 'D' into scoring probability 'PD' for the higher 'H' and the lower 'L' rated player respectively. Thus the two tables are effectively mirror-images.
8.2
Determining the Rating 'Ru' in a given event of a previously unrated player.
8.21
If an unrated player scores zero in his first rated event, his score is disregarded.
First determine the average rating of his competition 'Rc'.
(a) In a Swiss or Team tournament: this is simply the average rating of his rated opponents.
(b) The results of both rated and unrated players in a round-robin tournament are taken into account. For unrated players, the average rating of the competition 'Rc' is also the tournament average 'Ra' determined as follows:
(i) Determine the average rating of the rated players 'Rar'.
(ii) Determine p for each of the rated players against all their opponents.
Then determine dp for each of these players.
Then determine the average of these dp = 'dpa'.
(iii) 'n' is the number of opponents.
Ra = Rar - dpa x n/(n+1)
8.22
If he scores 50%, then Ru = Ra
8.23
If he scores more than 50%, then Ru = Ra + 20 for each half point scored over 50%
8.24
If he scores less than 50% in a Swiss or team tournament: Ru = Rc + dp
8.25
If he scores less than 50% in a round-robin: Ru = Ra + dp x n/(n+1).
8.3
The Rating Rn which is to be published for a previously unrated player is then determined as if the new player had played all his games so far in one tournament. The initial rating is calculated using the total score against all opponents. It is rounded to the nearest whole number.
8.4
If an unrated player receives a published rating before a particular tournament in which he has played is rated, then he is rated as a rated player with his current rating, but in the rating of his opponents he is counted as an unrated player.
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 opponent, D.
8.52
If the opponent is unrated, then the rating is determined at the end of the event. This applies only to round-robin tournaments. In other tournaments games against unrated opponents are not rated.
8.53
The provisional ratings of unrated players obtained from earlier tournaments are ignored.
8.54
A difference in rating of more than 400 points shall be counted for rating purposes as though it were a difference of 400 points.
8.55
(a) Use table 8.1(b) to determine the player’s score probability PD
(b) ΔR = score – PD. For each game, the score is 1, 0.5 or 0.
(c) ΣΔR x K = the Rating Change for a given tournament, or Rating period.
8.56
K is the development coefficient.
K = 40 for a player new to the rating list until he has completed events with at least 30 games
K = 20 as long as a player's rating remains under 2400.
K = 10 once a player's published rating has reached 2400 and remains at that level subsequently, even if the rating drops below 2400.
K = 40 for all players until their 18th birthday, as long as their rating remains under 2300.
8.57
The Rating Change is rounded to the nearest whole number. 0.5 is rounded up ( whether the change is positive or negative ).
8.58
Determining the Ratings in a round-robin tournament.
Where unrated players take part, their ratings are determined by a process of iteration. These new ratings are then used to determine the rating change for the rated players.
Then the ΔR for each of the rated players for each game is determined using Ru(new) as if an established rating.established rating.
8.
The working of the FIDE Rating System
The FIDE Rating system is a numerical system in which fractional scores are converted to rating differences and vice versa. Its function is to produce scientific measurement information of the best statistical quality.
8.1
The rating scale is an arbitrary one with a class interval set at 200 points. The tables that follow show the conversion of fractional score 'p' into rating difference 'dp'. For a zero or 1.0 score dp is necessarily indeterminate but is shown notionally as 800. The second table shows conversion of difference in rating 'D' into scoring probability 'PD' for the higher 'H' and the lower 'L' rated player respectively. Thus the two tables are effectively mirror-images.
8.2
Determining the Rating 'Ru' in a given event of a previously unrated player.
8.21
If an unrated player scores zero in his first rated event, his score is disregarded.
First determine the average rating of his competition 'Rc'.
(a) In a Swiss or Team tournament: this is simply the average rating of his rated opponents.
(b) The results of both rated and unrated players in a round-robin tournament are taken into account. For unrated players, the average rating of the competition 'Rc' is also the tournament average 'Ra' determined as follows:
(i) Determine the average rating of the rated players 'Rar'.
(ii) Determine p for each of the rated players against all their opponents.
Then determine dp for each of these players.
Then determine the average of these dp = 'dpa'.
(iii) 'n' is the number of opponents.
Ra = Rar - dpa x n/(n+1)
8.22
If he scores 50%, then Ru = Ra
8.23
If he scores more than 50%, then Ru = Ra + 20 for each half point scored over 50%
8.24
If he scores less than 50% in a Swiss or team tournament: Ru = Rc + dp
8.25
If he scores less than 50% in a round-robin: Ru = Ra + dp x n/(n+1).
8.3
The Rating Rn which is to be published for a previously unrated player is then determined as if the new player had played all his games so far in one tournament. The initial rating is calculated using the total score against all opponents. It is rounded to the nearest whole number.
8.4
If an unrated player receives a published rating before a particular tournament in which he has played is rated, then he is rated as a rated player with his current rating, but in the rating of his opponents he is counted as an unrated player.
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 opponent, D.
8.52
If the opponent is unrated, then the rating is determined at the end of the event. This applies only to round-robin tournaments. In other tournaments games against unrated opponents are not rated.
8.53
The provisional ratings of unrated players obtained from earlier tournaments are ignored.
8.54
A difference in rating of more than 400 points shall be counted for rating purposes as though it were a difference of 400 points.
8.55
(a) Use table 8.1(b) to determine the player’s score probability PD
(b) ΔR = score – PD. For each game, the score is 1, 0.5 or 0.
(c) ΣΔR x K = the Rating Change for a given tournament, or Rating period.
8.56
K is the development coefficient.
K = 40 for a player new to the rating list until he has completed events with at least 30 games
K = 20 as long as a player's rating remains under 2400.
K = 10 once a player's published rating has reached 2400 and remains at that level subsequently, even if the rating drops below 2400.
K = 40 for all players until their 18th birthday, as long as their rating remains under 2300.
8.57
The Rating Change is rounded to the nearest whole number. 0.5 is rounded up ( whether the change is positive or negative ).
8.58
Determining the Ratings in a round-robin tournament.
Where unrated players take part, their ratings are determined by a process of iteration. These new ratings are then used to determine the rating change for the rated players.
Then the ΔR for each of the rated players for each game is determined using Ru(new) as if an established rating.established rating.
In magicland they have months where there are two-round-a-day tournaments... Even if there was such a place, the pattern would not go unnoticed and the calculations would be done 'by hand', as the case is an exception and the magicland player would have his rating adjusted... That is if they didn't already have the 60 some games and the player's rating done in sequential order...
Y'all have two much time on your hands..
Y'all have two much time on your hands..
As for the 2800 question: this could only happen if a player wins all their games and all their opponents are rated 2400+, and they have played less than 30 games.
Similar things happened actually, maybe not that drastic but comparable.
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