This page explains how Paul B. Pell (USATT# 33189)'s rating went from 1623 to 1639 at the Cathrin "Back to Germany" Open held on - 16 Jul 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.