This page explains how Lin Sun (USATT# 147137)'s rating went from 1972 to 1920 at the Swan Friday O2000 Team League event from 23 Dec 2016. 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.