This page explains how Samuel S. Liang (USATT# 7755)'s rating went from 1893 to 1870 at the 2002 US National Championships held on - 22 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.