This page explains how Si Wasserman (USATT# 10947)'s rating went from 1515 to 1448 at the Huntsman World Senior Games held on - 11 Oct 2002. 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.