This page explains how Evelyn Chen (USATT# 271696)'s rating went from 867 to 857 at the Matchpoint TTC Friday League event from 26 May 2023. 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.