This page explains how Jason T. Tin Lau (USATT# 75018)'s rating went from 1316 to 1271 at the LATTF event from 19 Sep 2010. 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.