This page explains how Tim Vanzuiden (USATT# 82753)'s rating went from 811 to 794 at the 2015 Aurora Fall Open held on - 30 Aug 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.