This page explains how Johnny H Wong (USATT# 17990)'s rating went from 1865 to 1852 at the PTTC Saturday League event from 7 Dec 2013. 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.