This page explains how Bill Walk (USATT# 10889)'s rating went from 1704 to 1668 at the Robopong January 2013 Broward TTC Open held on - 13 Jan 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.