This page explains how David Lam (USATT# 85278)'s rating went from 289 to 618 at the NJTTC April Open held on - 1 May 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.