This page explains how Sajan Alapat (USATT# 85970)'s rating went from 1857 to 1820 at the LYTTC Friday Pro League event from 7 Sep 2018. 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.