This page explains how Evelyn Chen (USATT# 271696)'s rating went from 569 to 551 at the Matchpoint TTC Friday League event from 7 Jan 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.