This page explains how Alvin Chen (USATT# 89725)'s rating went from 1847 to 1842 at the NYISC New York Indoor Sports Club Friday Nights event from 16 Jun 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.