This page explains how Tiffany Lam (USATT# 96513)'s rating went from 544 to 543 at the PTTC Saturday League event from 27 Feb 2016. 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.