This page explains how Joel L. Lipschutz (USATT# 7800)'s rating went from 1680 to 1570 at the Rainbow Lakes Table Tennis Club event from 15 Oct 2017. 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.