This page explains how Patrick Keville (USATT# 77971)'s rating went from 1820 to 1759 at the LYTTC Friday Pro League event from 24 Jul 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.