This page explains how Wally Lien (USATT# 7766)'s rating went from 1272 to 1321 at the Portland Open July 98 Double R held on - 18 Jul 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.