FIDE:

FIDE is a rating system used by the website chess.com and others to rate players against eachother. It is similar to the ELO rating approach, in that beating another player increases your rank relative to their rank. If you beat someone 100 points below you, for example, then you gain very few points, and beating someone much better than you gives you more points. The same goes in the inverse: losing to a lower rated player loses you more, and losing to a higher rated player doesn't affect you as much. The starting rating is ~1000, and winning against someone about your own rating increases your rating by about 8 points. So for a player to be rated 3000, they'd have to be incredibly good.

Also, classical and rapid are time constraints. One is about 30+ minutes, the other is 5-30 minutes.

Top 5 Players.

Place, Rating: Classical-Rapid, Last Name, First Name, Country

• #1, Rating: 2859-2834, Carlson, Magnus, Norway
• #2, Rating: 2811-2829, Liren, Ding, China
• #3, Rating: 2793-2766, Nepomniachtchi, Ian, Russia
• #4, Rating: 2785-2745, Firouzja, Alireza, France
• #5, Rating: 2768-2789, Nakamura, Hikaru, United States

Citation

Descriptions:

The general logic behind ratings is that a player 100 points higher than you will beat you 75% of the time. Therefore a player 1-2 thousand points above the starting rating is orders of magnitude better than your average player. There are titles in Chess, increasing in rating. An IM, or international master, is someone who has won an official international championship. Their ratings are around 1900 to 2400. GM stands for global master, and is obtained by both winning 3 or more title games and having a rating of 2500 or more. A special, nonofficial title is granted to the top 25 or so players in the world, called WGM, or World Grand Master. They are several hundred points above a GM rating, and really can only challenge each other, as they are likely to always beat most if not all other players.