This page explains how Connor Y Lee (USATT# 197388)'s rating went from 2270 to 2249 at the LYTTC Friday Pro League event from 9 Oct 2020. 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.