This page explains how Alyssa Jian Kang (USATT# 212231)'s rating went from 500 to 497 at the Westchester 2017 February Open held on 25 Feb 2017 - 26 Feb 2017. 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.