Calculators: Ratings Change Caculator


Rating
Rc
W
K val
Help notes:
Rating - Rating of a player.
Rc - Opponent rating.
W - Score.
K val - K is the development coefficient.
K = 30 for a player new to the rating list until he has completed events with a total of at least 30 games.
K = 20 for RAPID and BLITZ ratings all players.
K = 15 as long as a player`s rating remains under 2400.
K = 10 once a player`s published rating has reached 2400, and he has also completed events with a total of at least 30 games. Thereafter it remains permanently at 10.
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