This page explains how Efrain Perez (USATT# 18421)'s rating went from 1178 to 1198 at the 10/10 Chinese One Day RR held on - 9 Oct 1999. 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.