This page explains how Leland Shapiro (USATT# 79604)'s rating went from 1809 to 1900 at the Huntsman World Senior Games held on - 6 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.