This page explains how Si Wasserman (USATT# 10947)'s rating went from 1628 to 1630 at the Huntsman World Senior Games held on - 16 Oct 1998. 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.