This page explains how Sergey Povzner (USATT# 140313)'s rating went from 909 to 821 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 15 Mar 2016. 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.