This page explains how Shaman Jain (USATT# 91966)'s rating went from 1919 to 1891 at the LYTTC Friday Pro League event from 13 Dec 2019. 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.