This page explains how Yuzhang Gao (USATT# 93176)'s rating went from 1984 to 2009 at the Swan Sunday League event from 9 Jul 2017. 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.