This page explains how Salvatore Gionfriddo (USATT# 197010)'s rating went from 471 to 470 at the Austin Table Tennis League event from 30 Apr 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.