This page explains how Alvin Yin (USATT# 216020)'s rating went from 1891 to 1844 at the NJTTC Monday League event from 27 Nov 2017. 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.