This page explains how Albert R. R. Fish (USATT# 60175)'s rating went from 1679 to 1681 at the John Jorgensen League event from 13 Feb 2005. 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.