This page explains how Alvin Yin (USATT# 216020)'s rating went from 1827 to 1807 at the NJTTC Monday League event from 10 Dec 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.