This page explains how Jonathan Cai (USATT# 216419)'s rating went from 1278 to 1274 at the HCTT Tuesday Night League event from 13 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.