This page explains how Angela Guan (USATT# 77760)'s rating went from 1245 to 1215 at the ICC CA State Open held on - 5 Dec 2010. 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.