This page explains how Alexander Shaposhnikov (USATT# 265133)'s rating went from 637 to 641 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 4 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.