This page explains how Tom Ruan (USATT# 14167)'s rating went from n/a to 1645 at the Cinco de Mayo RR held on - 3 May 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.