This page explains how Arseni Mouchinski (USATT# 1150994)'s rating went from 1807 to 1805 at the LYTTC Friday Pro League event from 25 Sep 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.