This page explains how Bill Ukapatayasakul (USATT# 10729)'s rating went from 1829 to 1822 at the OC Magic Spin TTC Open held on - 24 May 2015. 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.