This page explains how Alan B. Pruce (USATT# 19698)'s rating went from 1259 to 1424 at the Maryland May Circuit - Giant R held on - 26 May 2001. 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.