This page explains how RAYMOND D. SPANN (USATT# 10171)'s rating went from 1661 to 1609 at the Lakeland Table Tennis League event from 11 Dec 2005. 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.