This page explains how Sameh Awadallah (USATT# 88308)'s rating went from 2487 to 2477 at the Roslyn-Long Island Sports Center (LISC) League event from 31 Mar 2017. 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.