This page explains how Kagan Feng (USATT# 218625)'s rating went from 45 to 54 at the PTTC Saturday League event from 18 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.