This page explains how Bill Kochenderfer (USATT# 74416)'s rating went from 1823 to 1820 at the Sacramento Fall Open held on - 29 Oct 2011. 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.