This page explains how Sung Park (USATT# 264900)'s rating went from 197 to 191 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 22 Feb 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.