This page explains how Marcus Yao (USATT# 1132147)'s rating went from 1893 to 1879 at the LYTTC Friday Pro League event from 12 Nov 2021. 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.