This page explains how Martin Offergeld (USATT# 41730)'s rating went from 1512 to 1551 at the St. Louis Gateway Open held on - 17 Aug 1997. 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.