This page explains how Emily Tan (USATT# 91154)'s rating went from 1981 to 1999 at the Swan Friday O2000 Team League event from 6 Jan 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.