This page explains how Angie Tan (USATT# 87830)'s rating went from 1912 to 1904 at the Swan Friday O2000 Team League event from 12 Dec 2014. 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.