This page explains how Jason Lacey (USATT# 9257)'s rating went from 1531 to 1523 at the Friendliest Tournament in Amer held on - 27 Feb 1999. 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.