14.0. Some comments on the Rating system

14.1	The following formula gives a close approximation to tables 10.1a/b. P = 1/(1 + 10 - [D/400]). However the tables are used as shown.
14.2	Tables 10.1a/b are used precisely as shown, no extrapolations are made to establish a third significant figure.
14.3	K is used as a stabilising influence in the system. When K = 10, the rating turns over in approximately 75 games, K = 15, 50 games, K = 25 it is 30 games.
14.4	The system has been devised to enable players to verify their ratings readily. It would be more accurate to rate each game separately as averaging assumes a linear scale. However this would be much more laborious.