This page explains how William W.H. Cheung (USATT# 1728)'s rating went from 1681 to 1682 at the San Francisco Summer Open held on - 16 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.