This page explains how Jonathan Chu (USATT# 57948)'s rating went from 1974 to 1940 at the Brooklyn TTC February Open held on - 1 Feb 2009. 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.