This page explains how Aiman Elsherbiny (USATT# 95242)'s rating went from 1285 to 1223 at the Westchester 2014 December Open held on - 28 Dec 2014. 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.