This page explains how Jonathan Gehrkin (USATT# 91627)'s rating went from 1219 to 1216 at the HCTT Tuesday Night League event from 23 Aug 2016. 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.