This page explains how Raymond Chin-Man Yip (USATT# 22026)'s rating went from 1809 to 1960 at the Sacramento Summer Open held on - 22 Aug 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.