This page explains how Ayman Ibrahim (USATT# 96623)'s rating went from 1198 to 1181 at the Long Island's Woodbury Table Tennis League event from 3 Sep 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.