This page explains how Dan Lin (USATT# 70446)'s rating went from 2087 to 2039 at the Swan Friday O2000 Team League event from 7 Sep 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.