This page explains how Xiaofeng (frank Zhu (USATT# 27551)'s rating went from 1580 to 1544 at the Arkansas Open held on - 5 Oct 2002. 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.