This page explains how Ayman Ibrahim (USATT# 96623)'s rating went from 1350 to 1345 at the Roslyn-Long Island Sports Center (LISC) League event from 20 Apr 2018. 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.