This page explains how Xianzhong Chen (USATT# 25249)'s rating went from 1853 to 1807 at the Holiday Classic 2 Person Tm Op held on - 29 Dec 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.