This page explains how Jonathan Chu (USATT# 57948)'s rating went from 1956 to 1978 at the 1st NY City Cup Championships held on - 8 Dec 2002. 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.