This page explains how Paul B. Pell (USATT# 33189)'s rating went from 1613 to 1644 at the Grand Rapids October Open held on - 1 Oct 1994. 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.