This page explains how Liem Tran (USATT# 148855)'s rating went from 1357 to 1338 at the PTTC Saturday League event from 4 Feb 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.