This page explains how Ling Fan (USATT# 73523)'s rating went from 1913 to 1893 at the Central Carolinas Super League event from 17 Sep 2009. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.