This page explains how Thomas Mohn (USATT# 16479)'s rating went from 1241 to 1438 at the Pottsgrove TTC event from 19 Feb 2004. 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.