This page explains how Ken Girton (USATT# 6111)'s rating went from 1564 to 1542 at the Tucson Table Tennis Club League event from 21 Oct 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.