This page explains how Thomas Joseph Duggan (USATT# 148)'s rating went from 1448 to 1453 at the Waltham April Open RR held on - 27 Apr 1997. 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.