This page explains how Lawrence B Selvin (USATT# 29024)'s rating went from 1320 to 1318 at the Framingham TTC September Open held on - 18 Sep 2005. 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.