This page explains how Kelvin Lee (USATT# 216968)'s rating went from 1148 to 1147 at the Experior Club League event from 27 Apr 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.