This page explains how Sajan Alapat (USATT# 85970)'s rating went from 1870 to 1861 at the LYTTC Friday Pro League event from 31 Jan 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.