This page explains how Ayman Ibrahim (USATT# 96623)'s rating went from 868 to 861 at the Long Island's Woodbury Table Tennis League event from 9 Jun 2015. 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.