This page explains how Henrik Zhang (USATT# 87832)'s rating went from 2170 to 2150 at the Swan Friday O2000 Team League event from 18 Jan 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.