This page explains how David W. Corbett (USATT# 49353)'s rating went from 1610 to 1591 at the Keystone State Games held on - 6 Aug 1995. 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.