This page explains how Korky Greco (USATT# 219479)'s rating went from 1113 to 1112 at the 2017 Pittsburgh Amateur Pin Pong Festival held on 18 Nov 2017 - 19 Nov 2017. 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.