Rappel des règles
La calculette se base sur le dernier règlement officiel de la FIDE, en vigueur depuis le 1er mars 2024.
8.3 Determining the rating change for a rated player
8.3.1 For each game played against a rated player, determine the difference in rating between the player and their opponent, D.
A difference in rating of more than 400 points shall be counted for rating purposes as though it were a difference of 400 points.
8.3.2 a) Use table 8.1.2 to determine the player's score probability PD for each game.
b) Delta R = score - PD. For each game, the score is 1, 0.5 or 0.
c) Sigma Delta R = the sum of Delta Rs for a tournament or Rating Period.
d) Sigma Delta R x K = the Rating Change for a tournament or Rating Period.
8.3.3 K is the development coefficient.
K = 40 for a player new to the rating list until they have 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 the end of the year of their 18th birthday, as long as their rating remains under 2300.
If the number of games (n) for a player on any list for a rating period multiplied by K (as defined above) exceeds 700, then K shall be the largest whole number such that K x n does not exceed 700.
8.3.4 The Rating Change for a Rating Period is rounded to the nearest whole number. 0.5 is rounded away from zero.