This page explains how Tom Metz (USATT# 73482)'s rating went from 1220 to 1213 at the Rainbow Lakes Table Tennis Club event from 30 Nov 2018. 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.