This page explains how Nathan Gao (USATT# 202320)'s rating went from 1671 to 1668 at the LYTTC Friday Pro League event from 8 Nov 2019. 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.