This page explains how Alexander Yavorskiy (USATT# 93872)'s rating went from 1221 to 1231 at the Pong Planet Friday Night, Tuesday Night, And Saturday Leagues event from 24 Sep 2013. 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.