This page explains how Henry C Lou (USATT# 278365)'s rating went from 1148 to 1140 at the Spttc Saturday Junior League event from 20 May 2023. 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.