This page explains how Robert W. Cogley (USATT# 4961)'s rating went from 1674 to 1663 at the PA State Closed Championship 2 held on - 22 Apr 2001. 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.