This page explains how Phyllis Du (USATT# 75343)'s rating went from 2038 to 2037 at the 2009 Spinmania held on - 6 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.