This page explains how Wei Zhang (USATT# 93291)'s rating went from 1853 to 1838 at the MDTTC Tuesday/Friday League event from 20 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.