This page explains how Aharon Yitchok Shapiro (USATT# 22502)'s rating went from 1974 to 1968 at the California Open held on - 1 Sep 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.