This page explains how Thomas J. Golab (USATT# 6143)'s rating went from 1637 to 1620 at the Potomac Spring Open held on - 17 May 1998. 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.