This page explains how Ayman Ibrahim (USATT# 96623)'s rating went from 1240 to 1248 at the Roslyn-Long Island Sports Center (LISC) League event from 21 Dec 2016. 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.