This page explains how Raymond J. Sacco (USATT# 11297)'s rating went from 1983 to 1973 at the Holland Killerspin Table Tennis Club event from 11 Jan 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.