This page explains how Henrik Zhang (USATT# 87832)'s rating went from 2042 to 2001 at the Swan Friday O2000 Team League event from 19 May 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.