This page explains how Michael K. Marinas (USATT# 38893)'s rating went from 1566 to 1581 at the San Francisco Summer Open held on - 19 Aug 2007. 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.