This page explains how Drew Angell (USATT# 90312)'s rating went from 1163 to 1153 at the Harlings Upstairs event from 3 Jul 2013. 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.