This page explains how Drew Angell (USATT# 90312)'s rating went from 1169 to 1159 at the Harlings Upstairs event from 10 Apr 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.