This page explains how Alex Averin (USATT# 81774)'s rating went from 2406 to 2409 at the LYTTC Friday Pro League event from 4 Dec 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.