This page explains how Tim Yee (USATT# 74804)'s rating went from 1091 to 1090 at the AZ PTTC Monday event from 22 Oct 2014. 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.