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| FIDE Rating System (Part - 1) FIDE’s rating related laws are as follows: 0.0. Introduction The basic data for measurement of chess performances must be broad and ample. Play will be rated by FIDE when it takes place in a FIDE registered competition and meets all the following requirements. 0.1 The following regulations shall be altered by the General Assembly upon recommendation of the Qualification Commission. 0.11 Any such changes will come into effect on 1st July of the year following the decision by the General Assembly. For tournaments, such changes will apply to those starting on or after that date. 0.2 In principle, all important events should be rated. All top level tournaments may be rated by FIDE even if no rating report is submitted by the federation of the territory in which the event is held. (GA `96) 1.0 Rate of Play: 1.1 (PB 2000) For a game to be rated each player must have the following minimum periods in which to complete all the moves, assuming the game lasts 60 moves. 1.11 Where at least one of the players in the tournament has a rating 2200 or higher, each player must have a minimum of 120 minutes. 1.12 Where at least one of the players in the tournament has a rating 1600 or higher, each player must have a minimum of 90 minutes. 1.13 Where all the players in the tournament are rated below 1600, each player must have a minimum of 60 minutes.
1.14
Examples of ways in which 1.11 can be achieved include: All
the moves in 2 hours. 1.2 Games played with all the moves at a rate faster than the above are excluded from the list. 1.3 Where a certain number of moves is specified in the first time control, it is recommended be 40 moves. Players benefit from uniformity here. 2.0. Laws to be followed 2.1 Play must take place according to the FIDE Laws of Chess. 2.2 Smoking is banned in FIDE-rated events. Smoking is not permitted in the playing hall for the duration of the tournament. This applies to everyone present - players, officials, media representatives and spectators. A separate area outside the playing area must be provided where smoking is permitted. This should be easily accessible from the playing hall. If local ordinances totally prohibit smoking on the premises, the players and officials must be provided with easy access outdoors. 3.0. Number of rounds per day 3.1 No more than three rounds per day and a total playing time of no more than 12 hours. (GA '95) 4.0. Duration of the event 4.1 A period not greater than 90 days. 4.11 Leagues may be rated which last for a period greater than 90 days. The effective rating lists in 9.11 shall apply to games played within the respective rating periods. 5.0. Unplayed games 5.1 Whether these occur because of forfeiture or any other reason, they are not counted. 6.0. Composition of the tournament 6.1 If an unrated player scores zero or half in an event, his score and that of his opponents against him are disregarded. (GA 2003) 6.2 The results in events involving preliminaries and finals or play-offs are pooled. 6.3 In a round robin tournament at least one-third of the players must be rated. 6.31 If the event has less than 10 players, at least 4 must be rated. 6.32 In a double round tournament with unrated participants, there must be at least 6 players, 4 of whom must be rated. 6.33 National Championships played as round robins shall be rated if at least 3 men (or 2 women in events exclusively for women) participants had official FIDE Ratings before the beginning of the tournament. 6.4 In a Swiss or team event, only the games against rated opponents are counted. Scheveningen tournaments/matches in which more than one unrated player participates will not be rated. (GA 2002) 6.5 Where a match is over a specific number of games, those played after one player has won may not be rated. (GA 2000) 7.0. Registration of events to be rated 7.1 As in B.03. Events not pre-registered will not be rated.(GA 2000) 8.0. Submission of reports 8.1 As in B.01 article 7, except 7.2 is ignored where inapplicable. 9.0. Official FIDE Rating List 9.1 The Qualification Commission shall prepare a list four times a year (GA 1999) which incorporates the rated play during the rating period into the previous list. This shall be done using the rating system formula based on the percentage expectancy curve and derived from the normal distribution function of statistical and probability theory. 9.11 The list published 1.1 is used for events commencing 1.1-31.3 The list published 1.4 is used for events commencing 1.4-30.6 The list published 1.7 is used for events commencing 1.7-30.9 The list published 1.10 is used for events commencing 1.10-31.12 9.12 The following data concerning each player: 9.12a The name of each player whose rating exceeds 1800 as of the current date for the list. FIDE title, Federation, Current rating, ID Number, Number of games rated in the rating period, and Birth date. The current value of k for the player and over how many games this has been played when k = 25. (See 10.54b) 9.13 The
closing dates for receipt of information for a particular list are
usually
9.13a
Rated play completed or received after the closing date will not normally
be 9.14 A rating for a player new to the list shall be published only if it meets the following criteria: 9.14a If based on results obtained under 6.3., a minimum of 9 games.
9.14b If based
on results obtained under 6.4., a minimum of 9 games played 9.14c The condition of 9 games need not be met in one tournament: results from other events, played within the same or next 7 rating periods, are pooled to obtain the initial rating. 9.2 Players who are not to be included on the list:
9.21 Players whose ratings drop below
1801 are listed on the next list as "delisted". Thereafter
9.22 Unrated titled players are published
in a separate list concurrently with the list
9.23 Inactive players are not included
on the list but nonetheless are considered rated
9.23a
Players are considered to commence inactivity if they play fewer than
4 rated
9.23b
Inactive players are shown on the next 7 rating lists after starting
being considered inactive. 9.23c A player regains his activity if he plays at least 4 rated games in a one year period and he is then listed on the next list. 9.23d For the purposes of the FIDE rating list ranking of top players, a player who is inactive over a 12 months period of inactivity on the rating list will no longer appear on the monthly top list. 9.3 The Qualification Commission shall move to monthly rating lists on 1 July of the year following a decision to do by the Presidential Board. The above regulations shall be amended as follows: 9.31 The list published on the 1st of the month shall be effective between the first and the last day of that month. 9.32 The name of each player whose rating exceeds 1800 shall be published.
9.33 The closing date for receipt for
information will normally be the end of the month,
9.34 Players whose rating drops below
1801 will be listed in the next list as `delisted`. 10.0. The working of the FIDE Rating System The FIDE Rating system is a numerical system in which percentage scores are converted to rating differences and vice versa. Its function is to produce scientific measurement information of the best statistical quality. 10.1 The rating scale is an arbitrary one with a class interval set at 200 points. The tables that follow show the conversion of percentage score `p` into rating difference `dp`. For a zero or 100% score dp is necessarily indeterminate. 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. a. The table of conversion from percentage score, p, into rating differences, dp
b. Table of conversion of difference in rating, D, into scoring probability PD, for the higher, H, and the lower, L, rated player respectively.
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