This page explains how Xiangyu Liu (USATT# 77056)'s rating went from 1954 to 1998 at the Princeton Theological Seminary event from 31 Aug 2009. 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.