This page explains how Jason T. Tin Lau (USATT# 75018)'s rating went from 1303 to 1297 at the LATTF event from 9 Oct 2011. 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.