This page explains how Olga Driscoll (USATT# 83375)'s rating went from 874 to 818 at the June Westchester Table Tennis Open held on - 10 Jun 2012. 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.