This page explains how Raymond J. Sacco (USATT# 11297)'s rating went from 1965 to 1958 at the Holland Killerspin Table Tennis Club event from 31 Oct 2009. 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.