This page explains how Sergey Povzner (USATT# 140313)'s rating went from 608 to 508 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 20 Jan 2015. 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.