This page explains how Charles Curtis (USATT# 256614)'s rating went from 622 to 609 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 14 Mar 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.