This page explains how Alvin Yin (USATT# 216020)'s rating went from 1820 to 1817 at the NJTTC Thursday Adv League event from 16 Sep 2021. 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.