(1) What is a chess rating?
A chess rating is a number used to indicate the estimate playing strength of the chess player based on the player’s performance against other players.
A higher number usually indicates a stronger player.
Players' ratings go up if they perform better than expected and down if they perform worse than expected. The magnitude of the change depends on the rating of their opponents
The FIDE Elo rating system uses statistical formulas to measure the chess skill of a player by calculating the relative skill levels of players in a game. The creator, Arpad Elo, a Hungarian-born American physics professor, was a master-level chess player himself. The system has improved so much so that Elo rating can predict the outcomes of chess games with high consistency and reliability. For example, if player A has an Elo rating 245 points more than player B, the chances are player A will score 4 out of 5 points against player B. If the difference in rating is 200 points, the score is reduced to 3 out of 4 points. This reliability of prediction is a result of a very reliable rating system.
If a junior player who had a rating of 1010 before chess coaching and improved his rating to 1443 after three months of training, it allow chess coaches and players to measure and monitor the effectiveness of their training programs.
(2) How to get a chess rating?
For FIDE rating, refer to the World Chess Federation (FIDE) Rating Regulations at http://www.fide.com/component/handbook/?id=161&view=article
For ACF rating, ACF uses the Glicko system, which is different in terms of the formula used. The Glicko system can be found at http://en.wikipedia.org/wiki/Glicko_rating_system or - The Glicko System by Professor Mark Glickman, Boston University
(3) How to calculate rating?
For FIDE rating, refer to http://ratings.fide.com/calculators.phtml
For ACF rating, refer to Glicko calculator at http://www.glicko.net/glicko.html
(4) Where to look for Chess Rating?
For Australian Chess Federation ratings, refer to the ACF website at http://auschess.org.au/acf/
For World Chess Federation (FIDE) Rating, refer to the FIDE website at www.fide.com