This page explains how Thomas Tang (USATT# 212099)'s rating went from 1669 to 1668 at the Matchpoint TTC Friday League event from 27 Dec 2019. 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.