This page explains how Norie Mitteldorf (USATT# 221282)'s rating went from 392 to 390 at the North Bay Table Tennis League event from 5 Feb 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.