This page explains how Hsu-Chang Lu (USATT# 84845)'s rating went from 1560 to 1548 at the LYTTC Friday Pro League event from 21 Apr 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.