This page explains how Olin Xia (USATT# 224204)'s rating went from 32 to 27 at the PTTC Saturday League event from 21 May 2022. 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.