This page explains how Tiffany Lam (USATT# 96513)'s rating went from 77 to 69 at the PTTC Saturday League event from 22 Nov 2014. 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.