This page explains how Tingning Cheung (USATT# 27148)'s rating went from 1636 to 1631 at the LATTF event from 24 Apr 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.