This page explains how Hunlan Lin (USATT# 218055)'s rating went from 1891 to 1880 at the 2018 BTTC Summer Open held on 21 Jul 2018 - 22 Jul 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.