This page explains how Dan Lin (USATT# 70446)'s rating went from 2003 to 1973 at the Swan Friday O2000 Team League event from 9 Dec 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.