This page explains how Robert H. Mayer (USATT# 37621)'s rating went from 2171 to 2204 at the Spin Open held on - 4 Apr 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.