This page explains how DEREK LUNDIE (USATT# 211669)'s rating went from 1958 to 1969 at the Clearwater Fall Open held on 13 Oct 2018 - 13 Oct 2018. 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.