This page explains how John Jarema (USATT# 6975)'s rating went from 1922 to 1891 at the LYTTC Friday Pro League event from 4 May 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.