This page explains how Jim A. Engstrom (USATT# 70172)'s rating went from 1661 to 1643 at the Holland Killerspin Table Tennis Club event from 28 Apr 2010. 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.