This page explains how Winfred Addy (USATT# 12948)'s rating went from 2255 to 2253 at the 2015 Austin Spring Classic Round Robin Tournament held on - 26 Apr 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.