This page explains how Simeon Duran (USATT# 5507)'s rating went from 1217 to 1243 at the 1998 McAelster Open held on - 30 Aug 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.