This page explains how James Zhang (USATT# 98301)'s rating went from 1949 to 1938 at the MDTTC Tuesday/Friday League event from 24 Aug 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.