This page explains how Yun Fan (USATT# 81398)'s rating went from 1599 to 1554 at the 2013 Bellevue Fall Open held on - 22 Sep 2013. 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.