This page explains how Alyssa Jian Kang (USATT# 212231)'s rating went from 1839 to 1823 at the Westchester November 2019 Open held on 23 Nov 2019 - 24 Nov 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.